String start$\_$number is read from input. In create$\_$number$(),$ complete the recursive case to perform the following tasks for each digit at index i in r$\_$digits:

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

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

Recursively call create$\_$number$()$ with the two newly created strings and count as the arguments. Assign count with the value returned by create$\_$number$().$