4 deleted 657 characters in body
source | link

Jelly, 9 7 bytes

O+4ṾḊ$€

TryItOnline

How?

O+4ṾḊ$€ - Main link: s                                e.g. hello
O       - cast to ordinals                            e.g. [ 104,  101,  108,  108,  111]
 +4     - add 4                                       e.g. [  108,  109,  112,  112,  115]
     $€ - last two links as a monad for €ach
   Ṿ    -    uneval, effectively converts to strings  e.g. ["108","109","112","112","115"]
    Ḋ   -    dequeue, remove the leading '1'          e.g. [ "08", "09", "12", "12", "15"]
        - implicit print                              e.g. "0809121215"

Jelly, 9 7 bytes

O+4ṾḊ$€

TryItOnline

Jelly, 9 7 bytes

O+4ṾḊ$€

TryItOnline

How?

O+4ṾḊ$€ - Main link: s                                e.g. hello
O       - cast to ordinals                            e.g. [ 104,  101,  108,  108,  111]
 +4     - add 4                                       e.g. [  108,  109,  112,  112,  115]
     $€ - last two links as a monad for €ach
   Ṿ    -    uneval, effectively converts to strings  e.g. ["108","109","112","112","115"]
    Ḋ   -    dequeue, remove the leading '1'          e.g. [ "08", "09", "12", "12", "15"]
        - implicit print                              e.g. "0809121215"
3 deleted 657 characters in body
source | link

Jelly, 99 7 bytes

O_85D’FṾ€O+4ṾḊ$€

TryItOnlineTryItOnline

How?

To avoid explicitly padding with zeros this uses a different offset to first produce a number 11 higher, then converts each to a decimal list and decrements those values.

O_85D’FṾ€ - Main link: s      e.g. "hello"
O         - cast to ordinals  e.g. [  104,  101,  108,  108,  111]
 _85      - subtract 85       e.g. [   19,   16,   23,   23,   26]
    D     - to decimals       e.g  [[1,9],[1,6],[2,3],[2,3],[2,6]]
     ’    - decrement         e.g. [[0,8],[0,5],[1,2],[1,2],[1,5]]
      F   - flatten           e.g. [ 0,8,  0,5,  1,2,  1,2,  1,5 ]
       Ṿ€ - uneval each, effectively converts each to a string

Jelly, 9 bytes

O_85D’FṾ€

TryItOnline

How?

To avoid explicitly padding with zeros this uses a different offset to first produce a number 11 higher, then converts each to a decimal list and decrements those values.

O_85D’FṾ€ - Main link: s      e.g. "hello"
O         - cast to ordinals  e.g. [  104,  101,  108,  108,  111]
 _85      - subtract 85       e.g. [   19,   16,   23,   23,   26]
    D     - to decimals       e.g  [[1,9],[1,6],[2,3],[2,3],[2,6]]
     ’    - decrement         e.g. [[0,8],[0,5],[1,2],[1,2],[1,5]]
      F   - flatten           e.g. [ 0,8,  0,5,  1,2,  1,2,  1,5 ]
       Ṿ€ - uneval each, effectively converts each to a string

Jelly, 9 7 bytes

O+4ṾḊ$€

TryItOnline

2 added 662 characters in body
source | link

Jelly, 9 bytes

O_85D’FṾ€

TryItOnline

How?

To avoid explicitly padding with zeros this uses a different offset to first produce a number 11 higher, then converts each to a decimal list and decrements those values.

O_85D’FṾ€ - Main link: s      e.g. "hello"
O         - cast to ordinals  e.g. [  104,  101,  108,  108,  111]
 _85      - subtract 85       e.g. [   19,   16,   23,   23,   26]
    D     - to decimals       e.g  [[1,9],[1,6],[2,3],[2,3],[2,6]]
     ’    - decrement         e.g. [[0,8],[0,5],[1,2],[1,2],[1,5]]
      F   - flatten           e.g. [ 0,8,  0,5,  1,2,  1,2,  1,5 ]
       Ṿ€ - uneval each, effectively converts each to a string

Jelly, 9 bytes

O_85D’FṾ€

TryItOnline

Jelly, 9 bytes

O_85D’FṾ€

TryItOnline

How?

To avoid explicitly padding with zeros this uses a different offset to first produce a number 11 higher, then converts each to a decimal list and decrements those values.

O_85D’FṾ€ - Main link: s      e.g. "hello"
O         - cast to ordinals  e.g. [  104,  101,  108,  108,  111]
 _85      - subtract 85       e.g. [   19,   16,   23,   23,   26]
    D     - to decimals       e.g  [[1,9],[1,6],[2,3],[2,3],[2,6]]
     ’    - decrement         e.g. [[0,8],[0,5],[1,2],[1,2],[1,5]]
      F   - flatten           e.g. [ 0,8,  0,5,  1,2,  1,2,  1,5 ]
       Ṿ€ - uneval each, effectively converts each to a string
1
source | link