#include <stdio.h>

int main() {
    float w,h=0;
    float ret=0;
    while(scanf("%f %f",&w,&h)!=EOF)
    {
        h=h/100.0;
        ret=w/(h*h);
        if(ret<18.5)
        printf("Underweight\n");
        else if(ret>=18.5&&ret<=23.9)
        printf("Normal\n");
         else if(ret>23.9&&ret<=27.9)
             printf("Overweight\n");
            else  if(ret>27.9)
               printf("Obese\n");
    }
    return 0;
}