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<24.9){
        System.out.println("适中");
    }else if(bmi>=24.9){
        System.out.println("偏胖");
    }else{
        System.out.println("输入错误");
    }
}        

}