#include<iostream>
using namespace std;
string N,K;
int ans[]={4,2,8,5,7,1},n;
main()
{
	cin>>N>>K;
	for(int i=0;i<N.size();i++)n=(n*4+N[i]-'0')%6;
	char k=K[K.size()-1];
	bool flag=0;
	if(k=='0'||k=='2'||k=='4'||k=='6'||k=='8')flag=1;
	if(n==0)
	{
		cout<<ans[0]<<endl;
	}
	else if(n==1)
	{
		cout<<ans[1]<<endl;
	}
	else if(n==2)
	{
		cout<<ans[flag?4:2]<<endl;
	}
	else if(n==3)
	{
		cout<<ans[3]<<endl;
	}
	else if(n==4)
	{
		cout<<ans[4]<<endl;
	}
	else
	{
		cout<<ans[flag?1:5]<<endl;
	}
}