Uva- 10035

#include<stdio.h>
#include<string.h>
#include<math.h>
int check(long long int n, long long int m){
    long long int i=0, a, d=0, c, b;
    while(n!=0){
        a=n%10;
        n/=10;
        b=m%10;
        m/=10;
        c=i+a+b;
        if(c>=10){
            d++;
            i=1;
        }else{
            i=0;
        }
    }
    return d;
}
int main()
{
    int n, m, g;
    while(1){
        scanf("%d %d", &n, &m);
        if(n==0 && m==0)
            break;
        if(n>m)
            g=check(n,m);
        else
            g=check(m,n);
        if(g!=0)
            printf("%d carry operations.\n", g);
        else
            printf("No carry operation.\n");
    }
    return 0;
}