#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <string>
#include <cmath>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <cstring>

typedef long long ll;
using namespace std;

#define mod 1000000007
#define INF 1000000000 //(int)1e9
#define LLINF 2000000000000000000 //(ll)2e18
#define PI  3.1415926536

#define SIZE 100000


int main(){
    string n,m;
    int x,ans=1;
    
    cin >> n >> m;
    
    x = n[n.size()-1]-'0';
    
    for(int i=m.size()-1;i>=0;i--){
        
        for(int j=0;j<m[i]-'0';j++){
            ans = (ans * x)%10;
        }
        
        int t = x;
        
        for(int i=1;i<10;i++) x=(t*x)%10;
        
    }
    
    cout << ans << endl;
    
    
    
    
    return 0;
}