String start$\_$word is read from input. In scramble$\_$word$(),$ complete the recursive case to perform the following tasks for each letter at index i in r$\_$letters:

Create a new string that contains all the letters of r$\_$letters except the letter at index i$.$

Create a second new string that contains all the letters in s$\_$letters with the letter at index i added at the end of the string.

Recursively call scramble$\_$word$()$ with the two newly created strings as the arguments.