#include<iostream>
#include<cstdio>
#include<algorithm>
#include<vector>
#include<string>
#include<cstring>
#include<climits>
#include<functional>
#include<map>
#include<set>
using namespace std;
#define int long long

signed main(){
	int N,M;
	cin>>N>>M;
	int ans = 1;
	for(int i=0;i<M;i++){
		ans *= N; ans %= 10;
	}
	printf("%d\n",ans);
	return 0;
}