import scala.io.StdIn

object Problem167 {

  def proc(N: String, M: String): Int = {
    val a = BigInt(N)
    val b = BigInt(M)
    a.modPow(b, 10).toInt
  }

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

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