#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
ld pie=3.141592653589793;
ll inf=144494;
ll mod=1000000007;
int main(){
    string n,k;
    cin >> n >> k;
    ll x=0;
    ll ten=1;
    reverse(n.begin(),n.end());
    for (ll i = 0; i < n.size(); i++)
    {
        x+=(n[i]-'0')*ten;
        ten*=10;
        ten%=6;
        x%=6;
    }
    if (x==0)
    {
        cout << 4 << endl;
    }else if (x==1)
    {
        cout << 2 << endl;
    }else if (x==2)
    {
        if ((k[k.size()-1]-'0')%2)
        {
            cout << 8 << endl;
        }else{
            cout << 7 << endl;
        }
    }else if (x==3)
    {
        cout << 5 << endl;
    }else if (x==4)
    {
        cout << 7 << endl;
    }else if (x==5)
    {
        if ((k[k.size()-1]-'0')%2)
        {
            cout << 1 << endl;
        }else{
            cout << 2 << endl;
        }
    }
}