#include<stdio.h>
int main()
{
    float bmi;
    scanf("f",&bmi);
    if(bmi<18.5)
    {
        printf("underweight");
    }
    else if(bmi >=18.5 && bmi <= 24.9)
    {
        printf("Normal Weight");
    }
    else if(bmi >= 25)
    {
        printf("Overweight");
    }
    return 0;
}