#include <iostream>
#include <stdio.h>
#include <iomanip>
using namespace std;
int main(){
   unsigned a, b;
   int saida, q;
   cin>>a>>b;
   while(a!=0||b!=0){
        saida = 0;
        q = 0;
        while(a>0||b>0){
            int k = a%10+b%10+q;
            q = k%10;
            a/=10;
            b/=10;
            if(k>=10){
                saida++;
            }
        }
        if(saida==0){
            cout<<"No carry operation."<<"\n";
        }else if(saida==1){
            cout<<saida<<" carry operation."<<"\n";
        }else{
            cout<<saida<<" carry operations."<<"\n";
        }
        cin>>a>>b;
   }
}