# [Jelly], <s>12</s> 9 [bytes]

    ⁵ṁX€’Ṅ+OỌ

[Try it online!]

### How it works

    ⁵ṁX€’Ṅ+OỌ  Main link. Argument: s (string)

    ⁵             Set the return value to 10.
     ṁ            Mold; create an array of 10's with the length of s.
      X€          Pseudo-randomly pick a integer between 1 and 10, for each 10.
        ’         Decrement, so the integers fall in the range [0, ..., 9].
         Ṅ        Print the key, as an array, followed by a linefeed.
          +O      Add the integers to the ordinals (code points) of s.
            Ọ     Unordinal; convert back to characters.

[bytes]: https://github.com/DennisMitchell/jelly/wiki/Code-page
[Jelly]: https://github.com/DennisMitchell/jelly
[Try it online!]: http://jelly.tryitonline.net/#code=4oG14bmBWOKCrOKAmeG5hCtP4buM&input=&args=IkhlbGxvIFdvcmxkIg