#include <bits/stdc++.h>
using namespace std;
int main(){
string a,b;
cin>>a>>b;
if (b == "0") {
cout << 1 << endl;
return 0;
}
int x = a[a.length() -1] - '0';
int y = b[b.length() -1] - '0';
int s = 1;
for(int i=0;i<y;i++){
s *= x;
s %= 10;
}
cout << s << endl;
}