#include <iostream>
#include <cstdio>

using namespace std;

int main(){
    #ifdef ACM
        freopen("test.in", "r", stdin);
    #endif

    long long a,b; int carry,cont;
    while(cin >> a >> b && !(a == 0 && b == 0)){
        carry = cont = 0;
        while(a > 0 || b > 0 || carry > 0){
                if(a % 10 + b % 10 + carry > 9) carry = 1; else carry = 0;

                cont += carry;

                a = a/10;
                b = b/10;
        }

        switch(cont){
                case 0:
                    cout << "No carry operation." << endl;
                    break;
                case 1:
                    cout << "1 carry operation." << endl;
                    break;
                default:
                    cout << cont << " carry operations." << endl;
                    break;
        }
    }

    return 0;
}