#include <stdio.h>
#include<stdlib.h>

int main()
{
    long long n,m,s,t;
    int co,sum,carry;
    while( scanf("%lld %lld",&n,&m) == 2)
    {
        if(n == 0 && m == 0)
        {
            break;
        }

            carry = 0;
            co = 0;
            for(; n%10 != 0 || m%10 != 0;)
            {
                s = n%10;
                t = m%10;
                sum = s + t + carry;
                n = n/10;
                m = m/10;
                if(sum<10)
                {
                     carry = 0;
                    continue;
                }
                else
                {
                    co = co + 1 ;
                    carry  = sum/10;
                }
            }

        if( co == 0)
        {
            printf("No carry operation.\n");
        }
        else if(co == 1)
        {
            printf("%d carry operation.\n",co);
        }
        else
        {
            printf("%d carry operations.\n",co);
        }
    }
    return 0;
}