import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.next());
		int a=Integer.parseInt(sc.next());
		if(n==1) {
			if(a==2) {
				System.out.println(3);
			}
			else {
				System.out.println(2);
			}
		}
		else if(n==2) {
			if(a==1) {
				System.out.println(3);
			}
			else {
				System.out.println(1);
			}
		}
		else if(n==3) {
			if(a==1) {
				System.out.println(2);
			}
			else {
				System.out.println(1);
			}
		}
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz