#include <bits/stdc++.h>
using namespace std;
#define REP(i, n)           for(int(i)=0;(i)<(n);++(i))

int main(){
    do { cin.tie(0); ios_base::sync_with_stdio(false); } while(0);
    string N,M;
    cin >> N >> M;

    int n = 0, m = 0;
    n = N.back()-'0';
    if(M == "0"){ cout << 1 << endl; return 0; }

    int MOD = 0;
    switch(n%5){
    case 0: case 1: cout << n << endl; return 0;
    case 2: case 3: MOD = 4; break;
    case 4:         MOD = 2; break;
    }
    for(auto &c : M) m = (m * 10 + (c-'0')) % MOD;
    if(m == 0) m = MOD;

    int r = 1;
    REP(i,m) r = r * n % 10;
    cout << r << endl;
    return 0;
}