#include<iostream>
#include<algorithm>
#include<vector>
#include<string>
#include<utility>
#include<map>
#include<set>
#include<queue>
#include<stack>
#include<functional>
#include<math.h>
#include<random>
#include <bitset>
using namespace std;
#define N (1000000000+7)
//#define N 998244353
#define INF 1e16
typedef long long ll;
typedef pair<int,int> P;
typedef pair<int,P> Q;

const int inf = (int)1e9; 

ll gcd(ll a, ll b) {
	if (b > a) {
		ll tmp = b;
		b = a;
		a = tmp;
	}
	if (a%b == 0)return b;
	else return gcd(b, a%b);
}

ll inv(ll x,ll power) {
	ll res = 1;
	ll k = power;
	ll y = x%N;
	while (k) {
		if (k & 1)res = (res*y) % N;
		y = (y%N*y%N) % N;
		k /= 2;
	}
	return res;
}

ll c[200010];

int main(void){
	string n,m;
	cin>>n>>m;
	if(m.size()==1 && m[0]=='0')cout<<1<<endl;
	else{
		if(n[n.length()-1]=='0')cout<<0<<endl;
		else{
			if(n[n.length()-1]=='1'||n[n.length()-1]=='5'||n[n.length()-1]=='6'){
				cout<<n[n.length()-1]<<endl;
			}
			else{
				if(n[n.length()-1]=='4'||n[n.length()-1]=='9'){
					int x = m[m.length()-1]-'0';
					if(n[n.length()-1]=='4'){
						if(x%2==0)cout<<6<<endl;
						else cout<<4<<endl;
					}
					if(n[n.length()-1]=='9'){
						if(x%2==1)cout<<9<<endl;
						else cout<<1<<endl;
					}
				}
				else{
					int x = m[m.length()-1]-'0';
					int y = 0;
					if(m.length()>1)y = (m[m.length()-2]-'0');
					x = x+y*10;
					if(n[n.length()-1]=='2'){
						if(x%4==1){
							cout<<2<<endl;
						}
						if(x%4==2){
							cout<<4<<endl;
						}
						if(x%4==3){
							cout<<8<<endl;
						}
						if(x%4==0){
							cout<<6<<endl;
						}
					}
					if(n[n.length()-1]=='3'){
						if(x%4==1){
							cout<<3<<endl;
						}
						if(x%4==2){
							cout<<9<<endl;
						}
						if(x%4==3){
							cout<<7<<endl;
						}
						if(x%4==0){
							cout<<1<<endl;
						}
					}
					if(n[n.length()-1]=='7'){
						if(x%4==1){
							cout<<7<<endl;
						}
						if(x%4==2){
							cout<<9<<endl;
						}
						if(x%4==3){
							cout<<3<<endl;
						}
						if(x%4==0){
							cout<<1<<endl;
						}
					}
					if(n[n.length()-1]=='8'){
						if(x%4==1){
							cout<<8<<endl;
						}
						if(x%4==2){
							cout<<4<<endl;
						}
						if(x%4==3){
							cout<<2<<endl;
						}
						if(x%4==0){
							cout<<6<<endl;
						}
					}
				}
			}
		}
	}
	return 0;
}