#include <iostream>
using namespace std;

int main() {
   
    double weight;
    double height;

    cin >> weight;
    cin >> height;
    
    const string THIN = "偏瘦";
    const string VERY_THIN = "苗条";
    const string FIT = "适中";
    const string FAT = "偏胖";
    const double BMI = weight / (height * height) ;
    if (BMI < 18.5) {
        cout << THIN << endl;
    } else if (BMI >= 18.5 && BMI < 20.9) {
        cout << VERY_THIN << endl;
    } else if (BMI >= 20.9 && BMI <=24.9) {
        cout << FIT << endl;
    } else if (BMI > 24.9) {
        cout << FAT << endl;
    }

    return 0;
}