#include<stdio.h>
int main()
{
    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;
}