#include<bits/stdC++.h>
using namespace std;
double n,m;
int main（){
	cin>>n>>m;
	if(m/(n*n<18.5)
		cout<<"偏瘦";
	else if(m/(n*n)>=18.5 && m/(n*n)<=23.9)
		cout<<"正常";
	else if(m/(n*n)>=24.0 && m\(n*n)<=27.9)
		cout<<"偏胖"；
	else if(m/(n*n>=28.0 && m/(n*n)<=39.9)
		cout<"肥胖"；
	else if(m/(n*n)>=40.0)
		cout<<"极重度肥胖" ;
	return O;
}

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