import java.util.*;

class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int A = sc.nextInt();
    int B = sc.nextInt();
    switch (A){
    case 1:
      if (B==2){
        System.out.println("3");
      } else {
        System.out.println("2");
      }
      break;
    case 2:
      if (B==1){
        System.out.println("3");
      } else {
        System.out.println("1");
      }
      break;
    case 3:
      if (B==1){
        System.out.println("2");
      } else {
        System.out.println("1");
      }
      break;
    }
  }
}
/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