#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()
{
    string N;
    cin >> N;
    string M;
    cin >> M;

    const int mod = 10;
    int n = N[N.size() - 1] - '0';
    int m = stoi(M.size() > 4 ? M.substr(M.size() - 4) : M);
    m %= 4;
    int ans = 1;
    for (int i = 0; i < m; i++)
    {
        ans *= n;
        ans %= mod;
    }
    cout << ans << endl;
}