import java.io.*; import java.util.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); String s = sc.next(); int n = s.charAt(s.length() - 1) - '0'; char[] values = sc.next().toCharArray(); int ans = 1; int base = n; for (int i = values.length - 1; i >= 0; i--) { ans *= pow(base, values[i] - '0'); ans %= 10; base = pow(base, 10); } System.out.println(ans); } static int pow(int x, int p) { int ans = 1; for (int i = 0; i < p; i++) { ans *= x; ans %= 10; } return ans; } } class Scanner { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(""); StringBuilder sb = new StringBuilder(); 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(); } }