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