#include <iostream>
#include <algorithm>
using namespace std;
int main(){
unsigned long long a,b,c,d,sum,carrier,count;
while(cin>>a>>b){
if(a==0 && b==0) break;
sum=0;
carrier=0;
count=0;
while(a!=0 || b!=0)
{
c=a%10;
d=b%10;
sum=c+d+carrier;
if(sum>9)
count++;
carrier=sum/10;
a=a/10;
b=b/10;
}
if(count==0) cout<<"No carry operation."<<endl;
else if(count==1) cout<<count<<"1 carry operation."<<endl;
else cout<<count<<" carry operations."<<endl;
}
return 0;
}
