#include <bits/stdc++.h>
using namespace std;

int add(vector<int> &A, vector<int> &B)
{
    int cnt = 0, t = 0;

    for(int i = 0; i < A.size() || i < B.size(); i ++)
    {
        if(i < A.size()) t += A[i];
        if(i < B.size()) t += B[i];

        t /= 10;
        if(t) cnt ++;
    }

    return cnt;
}

int main()
{
    string a, b;
    while(cin >> a >> b)
    {
        if(a == "0" && b == "0") break;

        vector<int> A, B;

        for(int i = a.size() - 1; i >= 0; i --) A.push_back(a[i] - '0');

        for(int i = b.size() - 1; i >= 0; i --) B.push_back(b[i] - '0');

        int res = add(A, B);

        if(res == 0) cout << "No carry operation." << endl;
        if(res == 1) cout << res << " carry operation." << endl;
        if(res > 1) cout << res << " carry operations." << endl;
    }

    return 0;
}