#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
#define Inf 1000000001

int main(){
	
	int a,b,c;
	cin>>a>>b;
	if(a>b)swap(a,b);
	L:;
	if(b-a==4){
		c = b+4;
	}
	else if(b-a==8){
		c = a+4;
	}
	else{
		a += 12;
		swap(a,b);
		goto L;
	}
	c %= 12;
	cout<<c<<endl;
	
	return 0;
}