#include<stdio.h>
int main()
{
    float bm;
    scanf("%f",&bm);
    if(bm<18.5f)
    {
        printf("Underweight");
    }
    else if(bm < 25.0f)
    {
        printf("Normal weight");
    }
    else
    {
        printf("Overweight")''
    }
    return 0;
}