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