#include <bits/stdc++.h>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<int,P> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-9;
const ll mod=1e9+7;
const int dx[4]={0,1,0,-1},dy[4]={1,0,-1,0};

int f(string s,int p){
	int t=0;
	for(int i=0;i<s.size();i++) t=(t*10+(s[i]-'0'))%p;
	return t;
}

string s,t;

int main(){
	cin>>s>>t;
	int x=s.back()-'0',X=x;
	if(t=="0"){
		cout<<1<<endl;
		return 0;
	}
	if(!x){
		cout<<0<<endl;
		return 0;
	}
	vi a;
	do{
		a.push_back(X);
		(X*=x)%=10;
	}while(X!=x);
	int N=a.size();
	cout<<a[(f(t,N)+N-1)%N]<<endl;
}