#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> VI;
typedef vector<VI> VVI;
#define REP(i, n)           for(int(i)=0;(i)<(n);++(i))
#define FOR(i, f, t)        for(int(i)=(f);(i)<(t);(++i))
#define RREP(i, n)          for(int(i)=(n)-1;(i)>=0;--(i))

int binpow(ull x, ull k, int m){
    if(x==0) return 0;
    if(k==0) return 1;
    if(k%2==0) return binpow(((x%m)*(x%m))%m, k/2, m);
    else return ((x%m)*binpow(x, k-1, m)) % m;
}

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

    ull n = 0, m = 0;
    for(auto &c : N) n = (n * 10 + (c-'0')) % 10;

    int MOD = 0;
    if(M == "0"){ cout << 1 << endl; return 0; }
    if(n == 0){ cout << 0 << endl; return 0; }
    if(n == 1){ cout << 1 << endl; return 0; }
    if(n == 2) MOD = 4;
    if(n == 3) MOD = 4;
    if(n == 4) MOD = 2;
    if(n == 5){ cout << 5 << endl; return 0; }
    if(n == 6){ cout << 6 << endl; return 0; }
    if(n == 7) MOD = 4;
    if(n == 8) MOD = 4;
    if(n == 9) MOD = 2;

    for(auto &c : M) m = (m * 10 + (c-'0')) % MOD;

    cerr << "n = " << n << endl;
    cerr << "m = " << m << endl;

    cout << binpow(n,m,10) << endl;

    return 0;
}