package main

import (
	"fmt"
)

func main() {
	solve167()
}

func solve167(){
	var N, M int
	fmt.Scan(&N, &M)
	fmt.Println(pow(N, M))
}

const MOD = 10
func pow(x, n int) int {
	if n == 0 {
		return 1
	} else if x == 0 {
		return 0
	} else if n%2 == 0 {
		return pow(x*x%MOD, n/2)
	} else {
		return pow(x*x%MOD, n/2) * x % MOD
	}
}