package main

import (
	"fmt"
	"strconv"
)

func mod4(s string) int {
	l := len(s)
	if l > 2 {
		s = s[l-2:]
	}
	x, _ := strconv.Atoi(s)
	return x % 4
}

func main() {
	var N, M string
	fmt.Scan(&N, &M)
	n := int(N[len(N)-1] - '0')
	x := 1
	for i := 0; i < mod4(M)+4; i++ {
		x *= n
	}
	if M == "0" {
		x = 1
	}
	fmt.Println(x % 10)
}