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");
}
}
}