10035

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

int main()
{
    long long n,m,temp,tem,d,c,stemp,sum,sumTemp,sd,carry;
    while(1)
    {
        scanf("%lld %lld",&n,&m);
        if(n == 0 && m == 0)
        {
            break;
        }
        if( n > m)
        {
            tem = n;
            n = m;
            m = tem;
        }
        temp = m;
        stemp = n;
        carry = 0;
        sd = 0;
        while( temp != 0)
        {
            d = temp%10;
            c = stemp%10;
            temp = temp/10;
            stemp = stemp/10;
            d = d + sd;
            sum = d + c;
            if(sum<10)
            {
                continue;
            }
            else
            {
                sumTemp = sum;
                while( sumTemp != 0 )
                {
                    sd = sumTemp%10;
                    sumTemp = sumTemp /10;
                }
                carry++;
            }
        }
        if( carry == 0)
        {
            printf("No carry operation.\n");
        }
        else if(carry == 1)
        {
            printf("1 carry operation.\n");
        }
        else
        {
            printf("%lld carry operations.\n",carry);
        }
    }
    return 0;
}