Print X without X (cop's thread)

Question

This is the cop's thread of a cops-and-robbers challenge. You can view the robber's thread here

A pretty common beginner style question is to print some string, but there's a catch! You need to do it without using any of the characters in the string itself!

For this challenge, we will find out who is the best at printing X without X. There are two threads to this, a cop's thread and a robber's thread.

In the cop's thread (this thread), users will choose a language (which we will call Y) and a string (which we will call X) and write a program in language Y which takes no input, and outputs exactly X without using any of the characters in X. The cop will then post both X and Y without revealing the program they have written.

Robbers will select the cop's answers and write programs in language Y which take no input and output X. They will post these "cracks" as answers in their thread. A crack need only work, not to be the intended solution.

Once a cop's answer is one week old, so long as it has not been cracked, the cop may reveal their program and mark it as "safe". Safe answers can no longer be cracked and are eligible for scoring.

Cops will be scored by length of X in characters with smaller scores being better. Only safe answers are eligible for scoring.

Extra Rules

You may be as specific or precise in choosing your language as you wish. For example you may say your language is Python, or Python 3, Python 3.9 (pre-release), or even point to a specific implementation. Robber's solutions need only work in one implementation of the given language. So, for example, if you say Python is your language, a robber's crack is not required to work in all versions of Python, only one.

Since command line flags and repls count as different languages, if your language is one of those then you should indicate that as at least a possible option for the language. For ease of use, I ask that you assume there are no command line flags in cases where command line flags are not mentioned.

You may choose to have your output as an error. If your intended solution does output as an error, you must indicate this in your answer.

Find Uncracked Cops

<script>site = 'meta.codegolf'; postID = 5686; isAnswer = false; QUESTION_ID = 207558;</script><script src='https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js'></script><script>jQuery(function(){var u='https://api.stackexchange.com/2.2/';if(isAnswer)u+='answers/'+postID+'?order=asc&sort=creation&site='+site+'&filter=!GeEyUcJFJeRCD';else u+='questions/'+postID+'?order=asc&sort=creation&site='+site+'&filter=!GeEyUcJFJO6t)';jQuery.get(u,function(b){function d(s){return jQuery('<textarea>').html(s).text()};function r(l){return new RegExp('<pre class="snippet-code-'+l+'\\b[^>]*><code>([\\s\\S]*?)</code></pre>')};b=b.items[0].body;var j=r('js').exec(b),c=r('css').exec(b),h=r('html').exec(b);if(c!==null)jQuery('head').append(jQuery('<style>').text(d(c[1])));if (h!==null)jQuery('body').append(d(h[1]));if(j!==null)jQuery('body').append(jQuery('<script>').text(d(j[1])))})})</script>

Answer 1

Dis, Score: 1, cracked by Dingus

{

I have never thought of constructing the program when I posted this.

PS. Rule clarification.

• Output exactly a character whose codepoint is 123 in decimal integer.
• Do not output else.
• Then terminate the program.
• No Dis implementation whose { command does putchar(codepoint of (a%256)) rather than putchar(codepoint of a); if your implementation is so, reguster A must be exactly 123 when { is executed. deleted as reference implementation, implemented in C, uses putchar(char) and char stores eight octets (maybe not on some machines).

Intended solution

*|||*__>*__>_||^___________________________*!**}}*! Try it online! Link to my interpreter, with comments. This uses that 123=11120t=1-11122t-11122t. To produce 1 I had to make 00100t first by 0-01020t-01120t-01120t. Then I did it > twice.

Answer 2

Javastack, score 10, Cracked by exedraj

1234567890

Have fun ;}

My intended solution will not be posted here.

Answer 3

Javastack, score 13, Cracked again by exedraj

1234567890"nq

Have more fun ;}

To exedraj: HR couldn't modify ><> :)

Answer 4

Javastack, score 14, Cracked by exedraj - on to round 4!

1234567890"dqw

No add, no duplicate, no double, no random, no power - hopefully this will thoroughly bamboozle you.

Have fun!

I gave you back flatprint - you're gonna need it.

Answer 5

Javastack, score 15, Cracked by exedraj

1234567890"crsy

Game on, again.

Up-to-date copy of the interpreter

Answer 6

Javastack, score 16, ingeniously cracked by exedraj for the eighth time

1234567890gbsort

You thought the last one was hard...

Up-to-date copy of the interpreter

Answer 7

Javastack, score 1, Anticlimactically cracked by exedraj

a

So simply complex...

Up-to-date copy of the interpreter

I forgot how many ways JS has to get a NaN.

Answer 8

Javastack, score 8, round 11, Cracked by exedraj

dfhjkmuv

Probably the last one, unless an unintended crack is found.

Up-to-date copy of the interpreter, with ES2020 stuff removed

Answer 9

Perl 5, score: 38, safe.

No modules.

"#'$&;)+!,-./%07*245@6|89<>31:?\]^_`}~

I think this is still an easy problem.

Hint

• Try making integers with allowed characters.
• Then pass them to some functions.
• Finally concatenate them with something.

Solution

There can be some solutions; one is print chr length for qw x XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX x. Try it online! How to generate the solution

Answer 10

Vyxal O, score 51, Cracked by lyxal

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C

Only slightly evil :}

Answer 11

Vyxal O, score 57

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C!¬⇧İN⇩

Take 2.

Answer 12

Vyxal O, score 59, Cracked by lyxal

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C!¬⇧İN⇩Ż÷

Third time's the charm...

Answer 13

Vyxal O, score 63, Cracked by lyxal

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C!¬⇧İN⇩Ż÷«»`;

One more time...

Answer 14

Vyxal O, score 76

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C!¬⇧İN⇩Ż÷«»`;¥£¾¼⅛%→←"ẋ¤ȦF

This is difficult...

Answer 15

Vyxal O, score 72, Cracked by lyxal

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C!¬⇧İN⇩Ż÷«»`;¥£¾¼⅛%→←"

One more time...

Answer 16

Vyxal O, score 81, Cracked by lyxal

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C!¬⇧İN⇩Ż÷«»`;¥£¾¼⅛%→←"ẋ¤ȦFȧ⌐m⊍g

This is difficult...

Answer 17

Vyxal O, score 90, Cracked by lyxal

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C!¬⇧İN⇩Ż÷«»`;¥£¾¼⅛%→←"ẋ¤ȦFȧ⌐m⊍g≬\ṡ∷‡⁽⟨|⟩

This is difficult...

Answer 18

Vyxal O, score 105, Cracked by lyxal

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C!¬⇧İN⇩Ż÷«»`;¥£¾¼⅛%→←"ẋ¤ȦFȧ⌐m⊍g≬\ṡ∷‡⁽⟨|⟩‟„$∇_yǏṘRq꘍₍₌Π⁺

Just when you thought it wasn't hard enough already...

Answer 19

Vyxal O, score 125, Cracked by lyxal

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C!¬⇧İN⇩Ż÷«»`;¥£¾¼⅛%→←"ẋ¤ȦFȧ⌐m⊍g≬\ṡ∷‡⁽⟨|⟩‟„$∇_yǏṘRq꘍₍₌Π⁺ʀ↑↓G↲↳⋏⋎Ṅ⁋ð×‛√²⌈⌊:ḊD

The last one, for now.

Answer 20

Vyxal, score 159, cracked by Aaron

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C!¬⇧İN⇩Ż÷«»`;¥£¾¼⅛%→←"ẋ¤ȦFȧ⌐m⊍g≬\ṡ∷‡⁽⟨|⟩‟„$∇_yǏRq꘍₍₌Π⁺βτʀʁɾɽ¨żẏ?¹⁰²ǔǓǒǑǐǎꜝ₂₃₅&ẇŀl↑↓∴∵O¢ṙṗṖ¦†AVG↲↳⋏⋎Ṅ⁋×λ√⌈⌊:ḊD

My turn.

Answer 21

Vyxal, score 220, cracked by EmanresuA

,₴…‹›⟇+*/-d↵EǍ½ƒɖ1234567890ø∆e₈₇∞₆₄JpiẎȯhtḢṪḣṫ¡Þ₀₁C!¬⇧İN⇩Ż÷«»`;¥£¾¼⅛%→←"ẋ¤ȦFȧ⌐m⊍g≬\ṡ∷‡⁽⟨|⟩‟„$∇_yǏRq꘍₍₌Π⁺βτʀʁɾɽ¨żẏ?¹⁰²ǔǓǒǑǐǎꜝ₂₃₅&ẇŀl↑↓∴∵O¢ṙṗṖ¦†AVG↲↳⋏⋎Ṅ⁋×λ√⌈⌊:ḊDabcjnsvwxzBHIKMQSTUWXYZ)}]([{<>ḂĊḞĠĿṀȮṠẆẊ℅@°•ß€↔æƈ ¯±≠⁼≥≤=ḃ∩∪

More.

Answer 22

CLC-INTERCAL, score: 7, safe.

For clarification here is a sequence of seven octets to output in hex:

52 45 41 44 4f 55 54

Try it online!

The answer

Here is od -t x1 -v of source:

0000000 c4 d6 5e f1 4c 60 7b f7 c4 d6 5e f1 e2 e4 c2 7b
0000020 f1 4c 60 7b f1 c4 d6 5e f1 e2 e4 c2 7b f2 4c 60
0000040 7b f3 f6 f8 c4 d6 5e f1 e2 e4 c2 7b f3 4c 60 7b
0000060 f3 f7 f5 c4 d6 5e f1 e2 e4 c2 7b f4 4c 60 7b f1
0000100 f3 f6 f9 c4 d6 5e f1 e2 e4 c2 7b f5 4c 60 7b f1
0000120 f3 f5 f4 c4 d6 5e f1 e2 e4 c2 7b f6 4c 60 7b f5
0000140 f6 f6 c4 d6 5e f1 e2 e4 c2 7b f7 4c 60 7b f2 f5
0000160 f3 c4 d6 d9 c5 c1 c4 d6 e4 e3 5e f1
0000174

It's:

DO;1<-#7DO;1SUB#1<-#1DO;1SUB#2<-#368DO;1SUB#3<-#375DO;1SUB#4<-#1369DO;1SUB#5<-#1354DO;1SUB#6<-#566DO;1SUB#7<-#253DOREADOUT;1

in EBCDIC.

You may need compiler option -e, as character set guessing does not work.

See also

My answer on Restricted mini challenge

Answer 23

Vyxal D, score 233, cracked by aaroneous Miller

ḟṙIcKġ₴…‹›+*/-d↵Ǎ½ƒɖø∆₈₇∞₆₄JiẎȯht42069ḢṪḣṫ¡Þ₀₁C!¬⇧İNeVERgȮṄnaGḭ⟇ėyOU⊍p⇩Ż÷«»⌐m≬\ṡ∷‡⁽⟨|⟩‟„$∇_Ǐq꘍₍₌Π⁺βτʀʁɾɽ¨żẏ?¹⁰²ǔǓǒǑǐǎꜝ₂₃₅&ẇŀl↑↓∴∵¢`;¥£¾F¼⅛%→←"ẋ¤Ḋε€ṗṖ¦†ḃL¶ðZṘ↲↳⋏⋎⁋×λ√⌈⌊:Dbjwxz,BHMQSTXY)}]([{<>ḂĊḞĿṀṠẆẊ℅@°•ß↔æƈ§≈µ¯±≠⁼≥≤=∩s∪ĠṁȦ'ċḋṅ13578ȧ

lol

Answer 24

Vyxal D, score 239, cracked by Aaron

ḟṙIcKġ₴…‹›+*/-d↵Ǎ½ƒɖø∆₈₇∞₆₄JiẎȯht42069ḢṪḣṫ¡Þ₀₁C!¬⇧İNeVERgȮṄnaGḭ⟇ėyOU⊍p⇩Ż÷«»⌐m≬\ṡ∷‡⁽⟨|⟩‟„$∇_Ǐq꘍₍₌Π⁺βτʀʁɾɽ¨żẏ?¹⁰²ǔǓǒǑǐǎꜝ₂₃₅&ẇŀl↑↓∴∵¢`;¥£¾F¼⅛%→←"ẋ¤Ḋε€ṗṖ¦†ḃL¶ðZṘ↲↳⋏⋎⁋×λ√⌈⌊:Dbjwxz,BHMQSTXY)}]([{<>ḂĊḞĿṀṠẆẊ℅@°•ß↔æƈ§≈µ¯±≠⁼≥≤=∩s∪ĠṁȦ'ċḋṅ13578ȧ∧⟑∨^rA

No logic. No range. No Any.

Answer 25

Vyxal D, score 244, cracked by Aaroneous

ḟṙIcKġ₴…‹›+*/-d↵Ǎ½ƒɖø∆₈₇∞₆₄JiẎȯht42069ḢṪḣṫ¡Þ₀₁C!¬⇧İNeVERgȮṄnaGḭ⟇ėyOU⊍p⇩Ż÷«»⌐m≬\ṡ∷‡⁽⟨|⟩‟„$∇_Ǐq꘍₍₌Π⁺βτʀʁɾɽ¨żẏ?¹⁰²ǔǓǒǑǐǎꜝ₂₃₅&ẇŀl↑↓∴∵¢`;¥£¾F¼⅛%→←"ẋ¤Ḋε€ṗṖ¦†ḃL¶ðZṘ↲↳⋏⋎⁋×λ√⌈⌊:Dbjwxz,BHMQSTXY)}]([{<>ḂĊḞĿṀṠẆẊ℅@°•ß↔æƈ§≈µ¯±≠⁼≥≤=∩s∪ĠṁȦ'ċḋṅ13578ȧ∧⟑∨^rA□f.∑W

It's so sad that the last answer died of sigma.

Answer 26

Vyxal so, score 248, cracked by EmanresuA

 !"#$%&'()*+,-./023456789:;<=>?@ABCDEFGHIJKLNOQRSTUVXYZ[\]^_`abcdefghijlmnpqrtuvwxyz{|}~¡¢£¤¥¦§¨«¬¯°±²µ¶¹»¼½¾×Þßæð÷øĊċėĠġİĿŀŻżƈƒƛǍǎǏǐǑǒǓǔȦȧȮȯɖɽɾʀʁΠβελτḂḃḊḋḞḟḢḣḭṀṁṄṅṖṗṘṙṠṡṪṫẆẇẊẋẎẏ‛„‟†‡•…‹›⁋⁰⁺⁼⁽₀₁₂₃₄₅₆₇₈₌₍€₴℅⅛←↑→↓↔↲↳↵⇧⇩∆∇∑√∞∧∨∩∪∴∵∷≈≠≤≥≬⊍⋎⋏⌈⌊⌐□⟇⟑⟨⟩꘍ꜝ

The final challenge.

Answer 27

Vyxal so, score 249, cracked by aaroneous

 !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLNOQRSTUVXYZ[\]^_`abcdefghijlmnpqrtuvwxyz{|}~¡¢£¤¥¦§¨«¬¯°±²µ¶¹»¼½¾×Þßæð÷øĊċėĠġİĿŀŻżƈƒƛǍǎǏǐǑǒǓǔȦȧȮȯɖɽɾʀʁΠβελτḂḃḊḋḞḟḢḣḭṀṁṄṅṖṗṘṙṠṡṪṫẆẇẊẋẎẏ‛„‟†‡•…‹›⁋⁰⁺⁼⁽₀₁₂₃₄₅₆₇₈₌₍€₴℅⅛←↑→↓↔↲↳↵⇧⇩∆∇∑√∞∧∨∩∪∴∵∷≈≠≤≥≬⊍⋎⋏⌈⌊⌐□⟇⟑⟨⟩꘍ꜝ

We partake in a mild amount of tomfoolery.

Answer 28

Vyxal so, score 249, fricking gosh dang cracked by aaron

 !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUXYZ[\]^_`abcdefghijmnpoqrtuvwxyz{|}~¡¢£¤¥¦§¨«¬¯°±²µ¶¹»¼½¾×Þßæð÷øĊċėĠġİĿŀŻżƈƒƛǍǎǏǐǑǒǓǔȦȧȮȯɖɽɾʀʁΠβελτḂḃḊḋḞḟḢḣḭṀṁṄṅṖṗṘṙṠṡṪṫẆẇẊẋẎẏ‛„‟†‡•…‹›⁋⁰⁺⁼⁽₀₁₂₃₄₅₇₈₌₍€₴℅⅛←↑→↓↔↲↳↵⇧⇩∆∇∑√∞∧∨∩∪∴∵∷≈≠≤≥≬⊍⋎⋏⌈⌊⌐□⟇⟑⟨⟩꘍ꜝ

Commit utter frick.

Answer 29

Brainfuck

Level: baby

---

Should be pretty straight forward (literally), but I think it's still interesting

,-<>[]

Why I think it's interesting:

The fact that you can print any string with only two different characters in brainfuck is quite interesting in my opinion

Answer 30

!@#$%^&*()_+, Score: 2

^+