#include <iostream>
using namespace std;

int main() {
	long long a,b,c=0,d=0;

while(1){
cin>>a>>b;
if(a==0&&b==0)
break;
while(1){
if(a%10+b%10+c>=10){
c=(a%10+b%10+c)/10;
d++;}
else 
c=0;
a=a/10;
b=b/10;
if(a==0&&b==0)
break;
}
if(d==1){
cout<<"1 carry operation."<<endl;
d=0;}
else if(d==0)
cout<<"No carry operation."<<endl;
else{
cout<<d<<" carry operations."<<endl;
d=0;}
}
	return 0;
}