import scala.io.StdIn

object Problem167 {

  def proc(N: String, M: String): Int = {
    if (M.length == 1 && M.toInt == 0) return 1

    val a = N.last.asDigit
    val b = M.takeRight(2).toInt % 4 match {
      case 0 => 4
      case x => x
    }
    Math.pow(a, b).toInt % 10
  }

  def main(args: Array[String]) = {
    val N = StdIn.readLine()
    val M = StdIn.readLine()

    val result: Int = proc(N, M)
    println(result)
  }
}