// Author: btjanaka (Bryon Tjanaka)

// Problem: (UVa) 10035

#include <bits/stdc++.h>

#define GET(x) scanf("%d", &x)

#define GED(x) scanf("%lf", &x)

typedef long long ll;

using namespace std;

typedef pair<int, int> ii;

int main() {

while (true) {

int ch;

stack<int> a, b;

while ((ch = getchar()) != ' ') {

a.push(ch - '0');

}

while ((ch = getchar()) != '\n' && ch != EOF) {

b.push(ch - '0');

}

if (a.size() == 1 && b.size() == 1 && a.top() == 0 && b.top() == 0) break;

int res = 0;

int carry = 0;

while (!a.empty() || !b.empty()) {

int cur = (a.empty() ? 0 : a.top()) + (b.empty() ? 0 : b.top()) + carry;

carry = cur / 10;

if (cur >= 10) {

++res;

}

if (!a.empty()) a.pop();

if (!b.empty()) b.pop();

}

if (res == 0) {

printf("No carry operation.\n");

} else if (res == 1) {

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

} else {

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

}

}

return 0;

}