#include <iostream>
using namespace std;

int main() {
   
    double weight;
    double height;

    cin >> weight;
    cin >> height;
   
    if(weight/(height*height)<18.5)
    cout<<"偏瘦"<<endl;
    else if(weight/(height*height)>=18.5&&weight/(height*height)<=20.9)
    cout<<"苗条"<<endl;
    else if(weight/(height*height)>=20.9&&weight/(height*height)<=24.9)
    cout<<"适中"<<endl;
    else  cout<<"偏胖"<<endl;
    // write your code here......
    

    return 0;
}