import java.io.*; import java.util.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); char[] input = sc.next().toCharArray(); int n = input[input.length - 1] - '0'; int ans = 1; char[] next = sc.next().toCharArray(); for (int i = next.length - 1; i >= 0; i--) { ans *= pow(n, next[i] - '0'); ans %= 10; n = pow(n, 10); } System.out.println(ans); } static int pow(int x, int p) { if (p == 0) { return 1; } else if (p % 2 == 0) { return pow(x * x % 10, p / 2); } else { return pow(x, p - 1) * x % 10; } } } class Scanner { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(""); public Scanner() throws Exception { } public int nextInt() throws Exception { return Integer.parseInt(next()); } public long nextLong() throws Exception { return Long.parseLong(next()); } public double nextDouble() throws Exception { return Double.parseDouble(next()); } public String next() throws Exception { while (!st.hasMoreTokens()) { st = new StringTokenizer(br.readLine()); } return st.nextToken(); } }