#include <iostream>
using namespace std;

int main() {
   
    double weight;
    double height;

    cin >> weight;
    cin >> height;

    // write your code here......
    double BMI = weight / (height * height);//BMI计算公式
    if (BMI < 18.5)
    {
        cout << "偏瘦" << endl;
    }
    else if (BMI >= 18.5 && BMI <20.9)
    {
        cout << "苗条" << endl;
    }
    else if (BMI >= 20.9 && BMI <= 24.9)
    {
        cout << "适中" << endl;
    }
    else
    {
        cout << "偏胖" << endl;
    }

    return 0;
}