uva 10035

#include<stdio.h>
int main()
{
    long int a,b;
    int  i,carry,c,r;
    while(scanf("%ld%ld",&a,&b)==2)
    {
        if(a==0&&b==0)
            break;
        else
        {


        carry=0;
        r=0;
        for(i=1;i<=16;i++)
        {
            if(a==0&&b==0)
                break;
            c=(a%10)+(b%10)+r;


            if(c>9)
            {
                 carry++;
                 r=1;

            }
            else
            {
                r=0;
            }
            a=a/10;
            b=b/10;


        }
        if(carry==0)
           printf("No carry operation.\n");

        else if(carry==1)

            printf("1 carry operation.\n");

        else

            printf("%d carry operations.\n",carry);

    }
    }

    return 0;
}