Compute how many carries will occur when calculating the sum of two decimal numbers A and B.
For each case a line, there are two positive integers A and B. There are multiple cases (<1000) terminated by EOF.
Case #1: 0<A, B<1000
Case #2: 0<A, B<10^6
Case #3: 0<A, B<10^12
Case #4: 0<A, B<10^1000
For each case a line, output how many carries occur.