#include<iostream>
#include<string>
using namespace std;
int main()
{
    string x,y;
    freopen("myDearInput.in", "r", stdin);
    while(cin>>x>>y && x!="0" && y!="0")
    {

        if ( x.size() < y.size())
        {
            for (int b=0 ; b <=(y.size()-x.size()) ;b++ )
                x.insert(x.begin(), '0');
        }


        else if ( x.size() > y.size())
        {
            for (int b=0 ; b <=(x.size()-y.size()) ;b++ )
                y.insert(y.begin(), '0');
        }
        string  h=""; int carry=0 ,s=0 ,a=0;

        for(int i=(x.size()-1) ;i>=0 ;i--)
        {

            int f=x[i]-48 , j=y[i]-48 ;
            s=f+j+carry;
            if (s>9)
            {
                h.insert(h.begin() ,((s-10)+48));
                carry=1;
                a++;
                if (i==0)
                    h.insert(h.begin() ,((s/10)+48));

            }
            else
            {
                h.insert(h.begin() ,(s+48));
                carry=0;
            }

        }

        if (a==0)
            cout<<"No carry operation.";
        else if (a==1)
            cout<<"1 carry operation.";
        else
            cout<<a<<" carry operations.";
        cout<<endl;
    }
    return 0;
}