#include<iostream>
using namespace std;
int main()
{
	int x,y;
	while(cin>>x>>y&&x&y)
	{
		int count(0),sum(0);
		while(x&&y)
                {
			sum+=x%10+y%10;
			if(sum>9)
			{
				count++;
				sum=1;
			}
			else
				sum=0;
                x/=10;  
                y/=10;  
                }
		if(count)
		cout<<count<<" carry operations."<<endl;
		else
			cout<<"No carry operation."<<endl;
	}
	return 0;
}