#include<stdio.h>
struct BMIInfo
{
    float bmi;
};
int main()
{
    struc BMIInfo person;
    scanf("%f",&person.bmi);
    if(person.bmi<18.5)
    {
        printf("underweight");
    }
    else if(person.bmi>=18.5&&person.bmi<=24.9)
    {
        printf("normal weighat");
    }
    else
    {
        printf("Overweight");
    }
    return 0;
    }