#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef pair<ll,ll> P;
typedef modint998244353 mint;
#define rep(i,a,b) for(ll i=a;i<b;i++)
#define rrep(i,a,b) for(ll i=a;i>=b;i--)
const ll inf=1e9;
string s,t;
ll a,b;
int main(void){
    cin.tie(0);
    ios::sync_with_stdio(0);
    cin>>s>>t;
    a=(s[s.size()-1]-'0');
    b=(t[t.size()-1]-'0');
    ll ans=a;
    rep(i,0,b-1){
        ans=ans*a%10;
    }
    cout<<ans<<endl;

}