#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;
}