Write a program to add a number to every digits of a given number if it exceeds by 10 then consider only it's last digit.
Test case 1
input
345
3
Output
678
Explanation
3 +3 =6
4 + 3 = 7
5 + 3 = 8
Test case 2
Input
787
4
Output
121
Explanation
7+4=11 1 (last digit 1)
8+4=12 2
7+4=11 1
Test case 3
Input
471
4
Output
815