Description should be language-agnostic --> variable names that follow specific naming convention is not required, a generalized form of representation of Input --> Output will do

Lua translation ready for review !

in R you want to require "\n" and not "\n" as the line separator if the aim is to create shapes in formatted strings:

cat("aaa\nbbb")

aaa

bbb

cat("aaa\\nbbb")

aaa\nbbb

Proposed C# translation: https://www.codewars.com/kumite/65f3080bf4a0f70c9914c7d2?sel=65f3080bf4a0f70c9914c7d2

C#:

• No random tests

• Method name should be PascalCase (Please refer to implementation of backward compatibility here )

• Description should be reworded and reformatted for clarity

• Node 14. should be enabled

• Rust translation
• Go translation

JS: Node v14 should be used along with its appropiate assertion tools (Mocha + Chai).
Refer to this and this

There is a rule that N will always be > 0, but in tests I'm getting N = 0 (eg. N=0 X='w' Y='#'). Please, fix it.
Thanks.

The length of X is always 1, which isn't documented (or what does "a key of X" even mean?).

Julia translation

There is no test case in which the non-alphanumeric character is in the beginning or the middle.

C++ Translation

Please look at it

C# version has random string length tests, eventhough the description says otherwise.

"Both strings will be of length 18, and each character in the string will be a number between 1 and 9 inclusive."

Random tests are full of issues:

• No tests with correct length but only digits
• No tests with too short inputs containing letters
• Last 30 tests expect "INVALID" which means they are not random