/* -*- coding: utf-8 -*-
 *
 * 1893.cc:  No.1893 Cycle - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

/* subroutines */

/* main */

int main() {
  int x, y;
  scanf("%d%d", &x, &y);

  if (x > y) swap(x, y);
  int z = (y * 2 - x) % 12;

  printf("%d\n", z);
  return 0;
}