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 bim = weight /(height * height);
    if(bim < 18.5){
        System.out.println("偏瘦");
    }else if(bim >= 18.5 && bim <= 20.9){
         System.out.println("苗条");
    }else if(bim >= 20.9 && bim <= 24.9){
         System.out.println("适中");
    }else if(bim > 24.9){
        System.out.println("偏胖");
    }

}

}