Timus_1924

//Timus 1924
#include <iostream>
using namespace std;
int main()
{
    int n, z=0, rez;
    cin >> n;
    for(int i=1;i<n+1;i++)
    {
        if(z==0){z++;rez=1;}
        else if(z==1){z++;rez=1;}
        else if(z==2){z++;rez=2;}
        else if(z==3){z=0;rez=2;}
    }
        if(rez==1){cout << "grimy";}
        else if(rez==2){cout << "black";}
    return 0;
}