#include <iostream>;
using namespace std;
int main(){
int n1, n2;
while(cin >> n1 >> n2){
if(n1 == 0 && n2 == 0){
break;
}
int counter = 0;
int carry = 0;
int sum = 0;
while(n1 > 0 || n2 > 0){
sum = carry + (n1 % 10) + (n2 % 10);
if(sum >= 10){
counter++;
}
carry = sum/10;
n1 /= 10;
n2 /= 10;
}
if(counter == 1){
cout << counter << " carry operation." << endl;
} else if(counter > 1){
cout << counter << " carry operations." << endl;
} else {
cout << "No carry operation." << endl;
}
}
return 0;
}