#include<stdio.h>
struct weight
{
    float BMI;
};
int main()
{
    struct weight find;
    scanf("%f", &find.BMI);
    if (find.BMI >0.0&& find.BMI<18.5)
    {
        printf("Underweight");
    }
    else 
    {
    if (18.5<=find.BMI&&find || find.BMI>=24.9)
    {
        printf("Normal weight");
    }
    else
    {
    if (find.BMI >=25)
    {
        printf("Overweight");
    }
    return 0;
    }
    }
}