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