#include <stdio.h>

int main()
{
    
    int n;
    scanf("%d", &n);
    
    
    if(n<18.5)
    {
    {
        printf("Underweight");
    }
    else if (n>18.5 || n<24.9);
    {
        printf("Normal weight");
    }
    else (n>=25)
    {
        printyf("Overweight");
    }
    }
    return 0;
}