#include <iostream>

using namespace std;

double calculate_index(double weight, int height)
{
    double heightInMeters = height / 100;
    double index = weight / (heightInMeters*heightInMeters);

    return index;
}

int main()
{
    double height, weight;

    cin>>height>>weight;

    double index = calculate_index(weight, height);

    if(index < 18.5){
        cout<<"Underweight"<<endl;
    }
    else if(index < 25)
    {
        cout<<"Normal"<<endl;
    }
    else if(index < 30){
        cout<<"Overweight"<<endl;
    }
    else{
        cout<<"Obesity"<<endl;
    }

    return 0;
}