#include<stdio.h>
struct villagers
{
   float BMI;
};
int main()
{
    struct villagersv;
    float BMI;
    scanf("%f",&v.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;
}