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

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