#include<bits/stdc++.h>
using namespace std;
int Avg(int x,int y);
int main(){
	int x,y;
	cin>>x>>y;
	cout<<(Avg(x,y)+6)%12<<endl;
}
int Avg(int x,int y){
	if(abs(x-y)<6){
		return ((x+y)/2)%12;
	}
	else{
		return ((x+y)/2+6)%12;
	}
}