1936. 1대1 가위바위보.D1

import java.util.Scanner;
 
public class Solution {
 
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        //1.가위  2.바위  3.보
        if(a>b) {
            System.out.println("A");
        }
        if(a<b) {
            System.out.println("B");
        }
    }
 
}