#include<bits/stdc++.h>
using namespace std;
int main(){
	double bmi,h,w;
	cin>>h>>w;
	bmi=w/(h*h);
	if(bmi<18.5){
		cout<<"偏瘦";
	}
	else if(bmi<=23.9){
		cout<<"正常";
	}
	else if(bmi <= 27.9){
		cout<<"偏胖";
	}
	else if(bmi <= 39.9){
		cout<<"肥胖";
	}
	else{
		cout<<"极重度肥胖";
	}
	return 0;
}