#include <iostream>
using namespace std;

int main() {
	long long a,b;
	
	while(cin >> a >> b)
	{
		if(a == 0 && b == 0)
		{
			break;
		}
		
		int carry = 0;
		int carry_count = 0;
		
		while(a>0||b>0)
		{
			int sum = a%10 + b%10 + carry;
			if(sum >= 10)
			{
				carry = 1;
				carry_count++;
			}
			else
			{
				carry = 0;
			}
			a = a/10;
			b = b/10;
		}
		if(carry_count == 0)
		{
			cout << "No carry operation.\n";
		}
		else if(carry_count == 1)
		{
			cout << "1 carry operation.\n";
		}
		else
		{
			cout << carry_count <<" carry operation.\n";
		}

	}	
	return 0;
}