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