Mr$.$ Ramesh is the General Manager of BCCI Bank. He wants to generate the Customer Id for his customer in simple manner, so he decided to make customer id as the reverse of the

$(10M)$

given account number. Define the recursive function with the name generate$\_$customer$\_$id$($account$\_$no$),$ and write the complete program to generate the customer id using recursion. And also explain the working flow behind the recursive call.

Sample input:

Enter the account number: ${123456}_{?}$

Sample output:

Customer id of account number $123456$ is $654321.$