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