# Render “Digital Clock Style” Numbers

Write the shortest program which will take a string of numbers (of up to at least 20 length) as input, and display the output using the standard digital clock style numbers. For instance for input 81, a solution with ascii output would give:

`````` _
|_|  |
|_|  |
``````

Graphical output is also acceptable, if it helps.

-
any upper limit on "take a string of numbers as input" ? – Aman ZeeK Verma Feb 17 '11 at 19:29
Hmm, let's say one row on an 80 column screen (20) is good enough. – mootinator Feb 17 '11 at 20:06
– gnibbler Feb 17 '11 at 20:25
Also related: stackoverflow.com/q/3324301/code-golf-digital-clock – dmckee Feb 17 '11 at 22:15

## APL (Dyalog) (45)

``````{3 3⍴' _|'[1+⍵⊤⍨9⍴3]}¨⎕UCS'ા8धगɯે૙ࣃଏ૽'[1+⍎¨⍞]
``````

The string, `ા8धगɯે૙ࣃଏ૽`, are the unicode characters `2750 56 2343 2327 623 2759 2777 2243 2831 2813` (however, you should be able to just copy and paste it). They encode the numbers. The program reads a line from the keyboard.

Explanation:

• `1+⍎¨⍞`: read a line from the keyboard, parse each character as a digit, then add 1 to each number (APL arrays are 1-based by default).
• `⎕UCS'ા8धगɯે૙ࣃଏ૽'[`...`]`: Select the characters belonging to the digits of the numbers you entered, and look up the Unicode values.
• `{`...`}¨`: for each of these values, do:
• `1+⍵⊤⍨9⍴3`: get the first 9 base-3 digits from the value as expressed in base-3, and add 1 (because the arrays ar 1-based).
• `' _|'[`...`]`: select a space, horizontal line, or vertical line depending on these digits
• `3 3⍴`: format as a 3-by-3 box.
-

## Funciton

Not really a language suitable for golfing... but regardless, I tried to keep the code size as small as I could — quite a different challenge than in “usual” languages. This is 1555 characters or 3110 bytes (if encoded as UTF-16; UTF-8 is larger).

Here’s a screenshot of the program running. It really works :)

``````     ╓─╖ ╔╗┌─╖   ┌─╖
║ʜ║ ║╟┤↔╟┐ ┌┤‼╟┐
╙┬╜ ╚╝╘═╝│ │╘╤╝│
╔═╗  ┌┴────┐  │┌┴╖ ┌┴╖
║0║ ┌┴─┐  ┌┴─┐└┤ʜ╟─┤·╟┐
╚╤╝┌┴╖┌┴╖┌┴╖┌┴╖╘╤╝ ╘╤╝│
┌┘┌┤·╟┤ɦ╟┤·╟┤?╟ │  ┌┴╖│
│ │╘╤╝╘╤╝╘╤╝╘╤╝ └──┤‼╟┘
│┌┴╖│ ┌┴╖┌┘╔═╧╗    ╘═╝
└┤?╟┘┌┤?╟┘┌╢10║    ┌─────────┐
╘╤╝ │╘╤╝┌┘╚══╝ ┌─┬┘╔══╗┌──╖┌┴╖ ╓─╖
┘  └───┘╔════╗│┌┴┐║21╟┤>>╟┤·╟┐║ɦ║
╔════════╗║1005╟┘└┬┘╚══╝╘═╤╝╘╤╝│╙┬╜        ┌─┐
║14073768║╚════╝ ┌┴╖ ┌─╖ ┌┴╖┌┴╖└─┴─────────┘┌┴╖
║7584800 ╟───────┤?╟─┤‼╟─┤ʜ╟┤·╟─────────────┤·╟┐╔═══════╗╔══╗
╚════════╝       ╘╤╝ ╘╤╝ ╘╤╝╘╤╝    ╔══╗┌─╖┌┐╘╤╝│║2097151║║21╟┐
╔═══════════════╗│   ┘   │  │     ║48╟┤−╟┤├─┤┌┘╚══╤════╝╚══╝│
║140737555464224╟┘  ┌────┘┌┬┘     ╚══╝╘╤╝└┘┌┘│╓─╖ │┌┐┌─╖┌─╖┌┴─╖
╚═══════════════╝   │ ┌───┘└─────────┐┌┴─╖ │┌┘║↔║ ├┤├┤‼╟┤↔╟┤>>║
┌────────────┐┌────┐┌┴╖│┌────────────┐├┤<<║ ││ ╙┬╜┌┘└┘╘╤╝╘═╝╘╤═╝
│   ╔══╗╔═══╗├┘╓─╖ └┤·╟┘│   ╔══╗╔═══╗├┘╘╤═╝ │└─┐└─┤╔═╗┌┴╖ ┌──┘
│   ║95║║892║│┌╢‡╟┐ ╘╤╝ │   ║95║║877║│ ┌┘╔══╧═╗│  │║0╟┤?╟┬┘
│   ╚═╤╝╚═╤═╝││╙─╜│  │  │   ╚═╤╝╚═╤═╝│╔╧╗║2097║│  │╚═╝╘╤╝│
│╔══╗┌┴╖┌┐│  ││┌─╖│ ┌┴╖ │╔══╗┌┴╖┌┐│  │║1║║151 ║│  └──────┘
│║32╟┤?╟┤├┤  │└┤‼╟┘┌┤‡║ │║32╟┤?╟┤├┤  │╚═╝╚════╝│
│╚══╝╘╤╝└┘└──┴┐╘╤╝ │╘╤╝ │╚╤═╝╘╤╝└┘└──┴┐      ┌─┘
│    ┌┴╖     ┌┴╖┌─╖│ │ ┌┴╖│  ┌┴╖     ┌┴╖ ┌─╖┌┴╖
│    │‼╟─────┤·╟┤‼╟┘ │┌┤·╟┘  │‼╟─────┤·╟─┤‼╟┤‡║
└┐┌┐ ╘╤╝     ╘╤╝╘╤╝  ││╘╤╝┌┐ ╘╤╝     ╘╤╝ ╘╤╝╘╤╝
├┤├┐┌┴╖╔══╗  └──┐┌┐ │└┐├─┤├┐┌┴╖╔══╗  ├──┐└  │
│└┘└┤?╟╢32║╔═══╗├┤│┌┴╖││ └┘└┤?╟╢32║╔═╧═╗│┌┐┌┴╖╔══╗
╔╧══╗╘╤╝╚══╝║881╟┘│├┤?╟┘│    ╘╤╝╚══╝║325║└┤├┤?╟╢32║
║927║╔╧══╗  ╚═══╝ └┘╘╤╝╔╧═══╗╔╧══╗  ╚═══╝ └┘╘╤╝╚══╝
╚═══╝║124╟───────────┘ ║1019║║124╟───────────┘
╚═══╝             ╚════╝╚═══╝
``````

It could probably be smaller if I hadn’t made a mistake due to which the output was back to front; I fixed that by adding an extra function to reverse the input. Otherwise I would probably have to rewrite all of it.

I also made another mistake (swapping the operands in two calls to `‼`) which made it necessary to declare the extra `‡` function, but this one is so small it fits inside the main function and thus doesn’t add any characters!

-
Whoa, that looks cool. Not only the solution, the language too :-) – Joey May 7 '11 at 9:58
@Joey: Why, thanks! :) – Timwi May 7 '11 at 14:56

### wxpython, many characters

``````import wx, wx.gizmos as g

class T(wx.Frame):
def __init__(_):
wx.Frame.__init__(_, None, size = (800, 60))
l = g.LEDNumberCtrl(_, -1)
l.Value = raw_input()

class M(wx.App):
def OnInit(_):
T().Show()
return 1

M().MainLoop()
``````

Test

``````echo -n 81 | python codegolf-997-wx.py
``````

ps: not a serious entry, but looks like graphical output is also acceptable, so I just gave it a try :-)

-
 +1 Glad to see this :). – mootinator Feb 18 '11 at 4:27

## Golfscript - 66 chars

``````"placeholder text for userscript which counts chars             ";
``````

`xxd`: (use `xxd -r` to revert)

``````0000000: 332c 7b3a 533b 2e7b 3438 2d22 5e70 285d  3,{:S;.{48-"^p(]
0000010: 7025 d3c4 4ab1 7d4a b8dc 4469 ce41 2222  p%..J.}J..Di.A""
0000020: f303 227b 6261 7365 7d2f 3330 2f53 3d33  .."{base}/30/S=3
0000030: 2f3d 7b22 5f20 7c22 3d7d 257d 256e 407d  /={"_ |"=}%}%n@}
0000040: 2f3b                                     /;
``````

This follows most of the other answers in that there are no spaces between numbers and trailing spaces are kept in. A space between numbers can easily be added with `1+` before `{"_ |"=}%`. Packed into a base 3 number, and then as base 243 into a string.

-
Fair enough. I updated the question to not bother with the unnecessary space between numbers. – mootinator Feb 18 '11 at 5:12
I think the "placeholder..." thing is a bit confusing. – Eelvex Feb 18 '11 at 13:35

## J, 78 chars

90

``````,./(10 3 3\$((90\$3)#:1219424106940570763878862820444729939648410x){' _|'){~"./.Y
``````

eg:

``````,./(10 3 3\$((90\$3)#:1219424106940570763878862820444729939648410x){' _|'){~"./. '58321'
_  _  _  _
|_ |_| _| _|  |
_||_| _||_   |
``````

The key is in the encoding of digits as base-3 integers. Zero, for example is:

``````:
_
| |
|_|
``````

or `' _ | ||_|'`, which becomes 0102022123 = 2750.

-
 I could save 10 characters if J had high precision base-36 numbers. Any suggestions anyone? – Eelvex Feb 17 '11 at 23:09 I'm using binary now. I wonder if trinary would save me some strokes? – luser droog Dec 3 '12 at 4:59

### Windows PowerShell, 127

``````\$i="\$input"[0..99]
'☺ ☺☺ ☺☺☺☺☺','♠☻♥♥♦♣♣☻♦♦','♦☻♣♥☻♥♦☻♦♥'|%{\$c=\$_
""+(\$i|%{('···0·_·0··|0·_|0|_|0|_·0|·|'-split0)[\$c[\$_-48]]})}
``````

Since the strings contain some unpleasant-to-write characters, a hexdump for your convenience:

``````000: 24 69 3D 22 24 69 6E 70 │ 75 74 22 5B 30 2E 2E 39  \$i="\$input"[0..9
010: 39 5D 0A 27 01 00 01 01 │ 00 01 01 01 01 01 27 2C  9]◙'☺ ☺☺ ☺☺☺☺☺',
020: 27 06 02 03 03 04 05 05 │ 02 04 04 27 2C 27 04 02  '♠☻♥♥♦♣♣☻♦♦','♦☻
030: 05 03 02 03 04 02 04 03 │ 27 7C 25 7B 24 63 3D 24  ♣♥☻♥♦☻♦♥'|%{\$c=\$
040: 5F 0A 22 22 2B 28 24 69 │ 7C 25 7B 28 27 20 20 20  _◙""+(\$i|%{('
050: 30 20 5F 20 30 20 20 7C │ 30 20 5F 7C 30 7C 5F 7C  0 _ 0  |0 _|0|_|
060: 30 7C 5F 20 30 7C 20 7C │ 27 2D 73 70 6C 69 74 30  0|_ 0| |'-split0
070: 29 5B 24 63 5B 24 5F 2D │ 34 38 5D 5D 7D 29 7D     )[\$c[\$_-48]]})}
``````
-
Look at all the smileys.. – Wang Dingwei Feb 18 '11 at 4:58

## Golfscript - 97 chars

``````:*{32' _':\$@'14'{?~!=}:&~32}%n*{:x' |':|\'1237'&\$x'017'&|x'56'&}%n*{:x|\'134579'&\$x'147'&|x'2'&}%
``````
-
 Use the backtick to save a char for all the numeric strings (how do I insert this character in the code format?) – Nabb Feb 18 '11 at 5:00 @Nabb: You can’t — StackExchange is crap like that... – Timwi May 6 '11 at 13:29

JAVA SOLUTION

``````public class DigitalNumber {
public static void main(String args[]){
char[][] panel = new char[3][120]; //A 20 digit panel!
int digXIndex = 0;int digYIndex = 0;
for (int i=0;i<args[0].length(); i++){
int dig=Integer.parseInt(""+args[0].charAt(i));
panel[digXIndex][digYIndex]=32;
digYIndex++;
if (dig!=1 && dig!=4)
panel[digXIndex][digYIndex]='_';
else
panel[digXIndex][digYIndex]=32;
digYIndex++;
panel[digXIndex][digYIndex]=32;
digYIndex=3*i;
digXIndex++;
if (dig!=1 && dig!=2 && dig!=3 && dig!=7)
panel[digXIndex][digYIndex]='|';
else
panel[digXIndex][digYIndex]=32;
digYIndex++;
if (dig!=1 && dig!=0 && dig!=7)
panel[digXIndex][digYIndex]='_';
else
panel[digXIndex][digYIndex]=32;
digYIndex++;
if (dig!=6 && dig!=5)
panel[digXIndex][digYIndex]='|';
else
panel[digXIndex][digYIndex]=32;
digYIndex=3*i;
digXIndex++;
if (dig!=6 && dig!=8 && dig!=2 && dig!=0)
panel[digXIndex][digYIndex]=32;
else
panel[digXIndex][digYIndex]='|';
digYIndex++;
if (dig!=7 && dig!=4 && dig!=1)
panel[digXIndex][digYIndex]='_';
else
panel[digXIndex][digYIndex]=32;
digYIndex++;
if (dig!=2)
panel[digXIndex][digYIndex]='|';
else
panel[digXIndex][digYIndex]=32;
digXIndex=0;
digYIndex+=(i*3)+1;
}
for (int i=0; i<3; i++){
for (int j=0; j<120; j++)
if (panel[i][j]!=0)
System.out.print((char)(panel[i][j]));
else
System.out.print("");
System.out.println();
}
}
}
``````

SAMPLE I/O

``````java DigitalNumber 98765432109876543210
_  _  _  _  _     _  _     _  _  _  _  _  _     _  _     _
|_||_|  ||_ |_ |_| _| _|  || ||_||_|  ||_ |_ |_| _| _|  || |
_||_|  ||_| _|  | _||_   ||_| _||_|  ||_| _|  | _||_   ||_|
``````
-
I should start hating java :) – Aman ZeeK Verma Feb 17 '11 at 21:06
Java is great for many things, but terse code is not one of them. – Jonathan M Davis Feb 18 '11 at 11:32
Well, this code isn't even golfed. It could be way shorter. – Joey Apr 16 '11 at 9:20

## C# 369 Characters

``````static void Main(string[] a){var b = new[] {123,72,61,109,78,103,119,73,127,111};var g = new[]{" _  ","|","_","| ","|","_","| "};a[0].ToCharArray().SelectMany((x,w)=>g.Select((y,i)=>new{s=((b[x-48]>>i&1)==1)?y:new String(' ',y.Length),j=i,v=w})).GroupBy(z=>(z.j+2)/3).ToList().ForEach(q=>Console.WriteLine(String.Join("", q.OrderBy(l=>l.v).Select(k=>k.s).ToArray())));}
``````

I could easily cut a few characters out. The point was more to abuse LINQ :)

More whitespace version:

``````static void Main(string[] a)
{
var b = new[] {123, 72, 61, 109, 78, 103, 119, 73, 127, 111};
var g = new[] { " _  ", "|", "_", "| ", "|", "_", "| " };
a[0].ToCharArray().SelectMany(
(x,w)=>g.Select(
(y,i)=>new{s=((b[x-48]>>i&1)==1)?y:new String(' ',y.Length),j=i,v=w}))
.GroupBy(z=>(z.j+2)/3).ToList().ForEach(
q=>Console.WriteLine(
String.Join("", q.OrderBy(l=>l.v).Select(k=>k.s).ToArray())));
}
``````
-
First of all, you need a class declaration and `using`s (409). Then there is a some unnecessary whitespace that can be removed (402). The task states that whitespace between the digits shall be omitted (399). – Joey Apr 16 '11 at 12:26
Uh, thanks. I edited the task because nobody was following the original whitespace rule. Feel free to edit the answer if it offends you, because I just don't care. – mootinator Apr 16 '11 at 17:42
`g` is used only once, so you can save 7 characters by inlining it. – Timwi May 6 '11 at 1:10
Actually `b` is also used only once, so you can inline it too. Also, you can save a lot of characters if you change the integer array to `"{H=mNgwI\x7fo"`, or even shorter if you change `\x7f` to the actual character #127 (which is unprintable, but permissible). The `>>` will still work because there is an implicit conversion from `char` to `int`. – Timwi May 6 '11 at 1:14
Also, the `.ToCharArray()` and the `.ToArray()` are both redundant, you can just remove them :) – Timwi May 6 '11 at 1:16

# Mathematica 205 209 198 179

``````i = IntegerDigits; t = Thread; r = Rule;
z@n_ := Row@i@n /. t[r[Range[0, 9], Grid[Partition[ReplacePart[Characters@" _ |_||_|",
t[r[#, ""]]], 3], Spacings -> 0] &
/@ (i /@ {5, 24578, 49, 47, 278, 67, 6, 4578, , 78})]]
``````

Usage

``````z@1234567890
``````

-

# Python, 218180 176

`b=map(int,raw_input());a=map(int,bin(914290166014670372457936330)[2:]);c=' |_';p=lambda k:''.join(c[a[9*n+k]]+c[2*a[9*n+1+k]]+c[a[9*n+2+k]]for n in b)+'\n';print p(6)+p(0)+p(3)`

With line breaks:

``````b=map(int,raw_input())
a=map(int,bin(914290166014670372457936330)[2:])
p=lambda k:''.join(' |'[a[9*n+k]]+' _'[a[9*n+1+k]]+' |'[a[9*n+2+k]]for n in b)+'\n'
print p(6)+p(0)+p(3)
``````
-

# Bash, 11 characters

``````toilet "\$i"
``````

Yes I know, I'm cheating.

You need to have toilet installed.

-
And have the default font set to one with 7 segment display numbers. `figlet` would also work. – Rob Nov 14 '12 at 18:36

# D: 295 Characters

``````import std.stdio;void main(string[]a){string[3]o;foreach(c;a[1]){int n=cast(int)(c)-48;auto e=" ";o[0]~=n!=1&&n!=4?" _ ":"   ";o[1]~=!n||n>3&&n!=7?"|":e;o[1]~=n>1&&n!=7?"_":e;o[1]~=n<5||n>6?"|":e;o[2]~=!(n&1)&&n!=4?"|":e;o[2]~=!n||n>1&&n!=4&&n!=7?"_":e;o[2]~=n!=2?"|":e;}foreach(l;o)writeln(l);}
``````

More Legibly:

``````import std.stdio;

void main(string[] a)
{
string[3] o;

foreach(c; a[1])
{
int n = cast(int)(c) - 48;
auto e = " ";

o[0] ~= n != 1 && n != 4 ? " _ " : "   ";

o[1] ~= !n || n > 3 && n != 7 ? "|" : e;
o[1] ~= n > 1 && n != 7 ? "_" : e;
o[1] ~= n < 5 || n > 6 ? "|" : e;

o[2] ~= !(n&1) && n != 4 ? "|" : e;
o[2] ~= !n || n > 1 && n != 4 && n != 7 ? "_" : e;
o[2] ~= n != 2 ? "|" : e;
}

foreach(l; o)
writeln(l);
}
``````
-

Java Solution: 585 570 Chars

I don't think I'll be attempting any more golfing in Java...

``````import java.util.*;
public class CG997{public static void main(String[]args){
short[][]lets=new short[][]{{0,1,3,2,0,4,2,1,4},{0,0,3,0,0,4,0,0,4},{0,1,3,0,1,
4,2,1,3},{0,1,3,0,1,4,0,1,4},{0,0,3,2,1,4,0,0,4},{0,1,3,2,1,3,0,1,4},{0,1,3,2,1
,3,2,1,4},{0,1,3,0,0,4,0,0,4},{0,1,3,2,1,4,2,1,4},{0,1,3,2,1,4,0,0,4}};
String[]syms=new String[]{" ","_","|","  ","| "};
String s=new Scanner(System.in).nextLine();
for(int o=0;o<3;o++){for(char c:s.toCharArray()){for(int i =0;i<3;i++)
System.out.print(syms[lets[Short.parseShort(c+"")][i+o*3]]);
}System.out.println();}}}
``````
-
 Your java version is way better/shorter than mine :) btw!... does 6 in digital clock representation has a cap (_) at top or not? I got confused after you output! – Aman ZeeK Verma Feb 18 '11 at 22:02 Upon checking the coffee maker behind me, the 6's should have a cap. I'll update my solution. – Mitch Feb 18 '11 at 22:30

# JavaScript (145)

148 145

Since JavaScript doesn’t really have standard input/output, this is written as a function that takes a string and returns the output as a string.

``````function r(n){for(i=o="",b=" |_\n|",L=n.length;i<3*L;)o+=b[(c="ǪĠòƲĸƚǚĢǺƺ".charCodeAt(n[i%L])>>(i++/L|0)*3)&1]+b[c&2]+b[c&4]+b[i%L?0:3];return o}
``````

Spaced out:

``````function r(n)
{
for (i = o = "", b = " |_\n|", L = n.length;   i < 3*L;   )
o += b [ (c = "ǪĠòƲĸƚǚĢǺƺ".charCodeAt(n[i%L]) >> (i++/L|0)*3) & 1 ] +
b [ c&2 ] +
b [ c&4 ] +
b [ i%L ? 0 : 3 ];  // space or newline
return o
}
``````

Here’s how it works:

• Every digit shape is encoded in a Unicode character consisting of 9 bits.
• The first three bits are for the first row, etc.

• In each group of three bits, the first specifies whether the first character is `|` or space, the second whether it’s `_` or space, and the third again `|` or space.

• These three bits are retrieved as `c&1`, `c&2` and `c&4`, which are then used as indexes into the string `b`.

• At each iteration, `i%L` is the “x-coordinate”, i.e. the digit within the input `n`

• At each iteration, `i/L` is the “y-coordinate”, i.e. the row, but we need `|0` to make it an integer

• Finally, the spaces between the digits and the newlines between the lines are also retrieved by indexing into `b`, re-using the space character and the otherwise unused position 3 in that string! :)

-
 Unicode! BAH! ... well, it is shorter than mine. +1 – luser droog Dec 3 '12 at 4:54

## Perl (182 180)

``````#!perl -l
\$_=<<7;
_     _  _     _  _  _  _  _
| |  | _| _||_||_ |_   ||_||_|
|_|  ||_  _|  | _||_|  ||_| _|
7
@b=map{[/(...)/g]}split/\n/;@d=split//,<>;for\$p(@b){print map\$p->[\$_],@d}
``````

``````\$ perl 7segment.pl
1234567890987654321
_  _     _  _  _  _  _  _  _  _  _  _  _     _  _     _
| _| _||_||_ |_   ||_||_|| ||_||_|  ||_ |_ |_| _| _|  || |
||_  _|  | _||_|  ||_| _||_| _||_|  ||_| _|  | _||_   ||_|
``````
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## Ghostscript (270)(248) (214)

Edit: More substitutions. Removed space between digits.

Edit: Even more substitutions. Main loop now looks like what it does!

``````/F{forall}def[48<~HUp;::1ncBInp~>{1 index 1 add}F
pop/*{dup
2 idiv exch
2 mod
1 eq}/P{print}/#{( )P}/?{ifelse
# _ #}F()=]2{{| _ |}F()=]}repeat]pop[[[[}F
``````

Uses ghostscript's argument-processing feature: invoke with `gs -dNODISPLAY -- digit.ps 012 345 6789`.

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## Ruby, 142

``````' _     _  _     _  _  _  _  _
| |  | _| _||_||_ |_   ||_||_|
|_|  ||_  _|  | _||_|  ||_| _|'.lines{|l|puts x.chars.map{|i|l[i.to_i*3,3]}*''}
``````

expects input in the variable `x`. examples:

``````x = '321'
#  _  _
#  _| _|  |
#  _||_   |

x = '42'
#      _
#  |_| _|
#    ||_
``````
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 ooooo. pretty! ... – luser droog Dec 3 '12 at 4:49

# Ocaml, 268

``````let t=function|'1'|'4'->"   "|_->" _ "let m=function|'0'->"| |"|'1'|'7'->"  |"|'2'|'3'->" _|"|_->"|_|"|'5'|'6'->"|_ "let b=function|'0'|'8'->"|_|"|'1'|'4'|'7'->"  |"|'2'->"|_ "|_->" _|"let f s=let g h=String.iter(fun c->print_string(h c))s;print_newline()ing t;g m;g b
``````

``````let t = function
| '1'
| '4' -> "   "
| _ -> " _ "
let m = function
| '0' -> "| |"
| '1'
| '7' -> "  |"
| '2'
| '3' -> " _|"
| _ -> "|_|"
| '5'
| '6' -> "|_ "
let b = function
| '0'
| '8' -> "|_|"
| '1'
| '4'
| '7' -> "  |"
| '2' -> "|_ "
| _ -> " _|"
let f s =
let g h =
String.iter (fun c -> print_string (h c)) s;
print_newline () in
g t;
g m;
g b
``````
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