#!/usr/bin/env python
#coding:utf8


def read():
    N = input()
    M = input()
    return N, M


def work((N, M)):
    N %= 10

    cur = 1
    visited = [-1 for i in range(10)]
    
    for loop in range(100):
        if visited[cur] != -1:
            cycle = loop - visited[cur] + 1
            break
        
        visited[cur] = loop
        cur = cur * N % 10

    cur = 1
    for i in range(M % cycle):
        cur = cur * N % 10
    print cur
    

if __name__ == "__main__":
    work(read())