// editor2
#include<stdio.h>
int main()
{
    float b;
    scanf("%f",&b);
    if(b>=25)
    {
        printf("Overweight");
    }
    else if(18.5=>b<=24.9)
    {
        printf("Normal weight");
    }
    else
    {
        printf("Underweight");
    }
    return 0;
}