import std;

int calc(string n, string m) {

    int mod4(string s) {
        int m = 0;
        foreach (c; s) {
            m = (10 * m + (c - '0')) % 4;
        }
        return m;
    }

    if (m == "0") return 1; // n^0 = 1
    int d = n[$-1] - '0';
    return (d ^^ (mod4(m) + 4)) % 10;
}

void main() {
    string n = read!string;
    string m = read!string;
    writeln(calc(n, m));
}

void scan(T...)(ref T a) {
    string[] ss = readln.split;
    foreach (i, t; T) a[i] = ss[i].to!t;
}
T read(T)() { return readln.chomp.to!T; }
T[] reads(T)() { return readln.split.to!(T[]); }
alias readint = read!int;
alias readints = reads!int;