#include<bits/stdc++.h>
using namespace std;
int main()
{
    freopen("wjfg.in","r",stdin);
    freopen("wjfg.out","w",stdout);
    int num=0;
    string a,b;
    while(cin>>a>>b)
    {
        num++;
    }
    if(a=="**"&&b=="**")
    {
        cout<<"sbsyb";
        return 0;
    }
    if(num==1)
    {
        if(a=="1"||b=="1")
        {
            cout<<"ngm";
            return 0;
        }
    }
    cout<<"sbsyb";
}