// editor2
#include<stdio.h>
int main()
{
    float bmi;
    scanf("%f",&bmi);
    if(bmi<18.5)
    {
        printf("Underweight");
    }else if (bmi>-18.5 && bmi<-24.9){
        printf(""Overweight");
    }else{
        printf("Normal weight");
    }
    return 0;
}