#include <bits/stdc++.h>
using namespace std;

template <typename T>
T gcd(T x, T y)
{
    if (y == 0)
        return x;
    return gcd(y, x % y);
}

template <typename T>
T lcm(T x, T y)
{
    if (x == 0 || y == 0)
        return 0;
    return x / gcd(x, y) * y;
}

int main()
{
    const int mod = 10;
    string N;
    cin >> N;
    string M;
    cin >> M;

    if (M == "0")
        cout << 1 << endl;
    else
    {
        int m = stoi(M.size() > 3 ? M.substr(M.size() - 3) : M);
        int n = N.back() - '0';
        cout << (int)pow(n, (m + 3) % 4 + 1) % mod << endl;
    }
}