include

include <math.h>

using namespace std;

int main() {

double a,b,c;
cin>>a>>b;
c=b/(a*a);
if(c<18){
        cout<<"underweight";
}else if(c<25){
    cout<<"normal";
    }else if(c<27){
        cout<<"overweight";
        }else {
            cout<<"obese";
            }
}