import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int line = sc.nextInt();
		int line2 = sc.nextInt();
      	int ans = 0;
      if(line == 1){
        if(line2 == 2){
          ans = 3;
        }else{
          ans = 2;
        }
      }
      if(line == 2){
        if(line2 == 1){
          ans = 3;
        }else{
          ans = 1;
        }
      }
      if(line == 3){
        if(line2 == 1){
          ans = 2;
        }else{
          ans = 1;
        }
      }
      System.out.println(ans);
    }
}
/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