import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double height = scanner.nextDouble();
        double weight = scanner.nextDouble();

        //write your code here......
        double BMI = weight / (height * height);
        if (BMI < 18.5 ){
            System.out.println("偏瘦");
        } else if(BMI < 20.9){
            System.out.println("苗条");
        } else if(BMI < 24.8){
            System.out.println("适中");
        } else if(BMI >= 24.9){
            System.out.println("偏胖");
        } else {
            System.out.println("输入无效请检查");
        }

    }
}