You are give an array of strings and a single character K as arguments. Return a single string containing all of the original strings joined by the character K.

Requirements

• Must return a string

Example #1

solve(["Hi", "there", "how", "are", "you"], "_")
> "Hi_there_how_are_you"

Example #2

solve(["a", "a", "a"], "b")
> "ababab"