#include<iostream.h>
int main()
{
	int count;
	long first,second;
	while(cin>>first>>second)
	{
		count=0;
		if(first==0&&second==0) break;
		for(;first>0||second>0;)
		{
			if(first%10+second%10>=10)
			{
				count++;
				first+=10;
			}
			first/=10;
			second/=10;
		}
		if(count==0) cout<<"No carry operation.\n";
		else if(count==1)
			cout<<count
			    <<" carry operation.\n";
		else cout<<count
			    <<" carry operations.\n";
	}
	return 0;
}