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