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");
}
}
}