#include<stdio.h>

union HealthData
{
    float bmi;
};
int main()
{
    struct villagerperson;
    scanf("%f",&person.data.bmi);
    if(person.data.bmi<18.5)
    {
        printf("Underweight\n");
    }
    else if(person.data.bmi>=18.5&&person.data.bmi<24.9)
    {
        printf("Normal weight\n");
    }
    else
    {
        printf("Overweight\n");
    }
    return 0;
}