package main
import (
    "fmt"
    "math/big"
)

func pow(x, y *big.Int) int{
    x = x.Mod(x, big.NewInt(10))
    xx := int(x.Uint64())
    zero := big.NewInt(0)
    z := 1
    for ; y.Cmp(zero) != 0 ; {
        if y.Bit(0) == 1 {
            z = z * xx % 10
        }
        xx = xx * xx % 10
        y = y.Rsh(y, 1)
    }
    return z
}

func main() {

    var sx, sy string
    fmt.Scan(&sx)
    fmt.Scan(&sy)
    x := big.NewInt(1)
    y := big.NewInt(1)
    x.SetString(sx, 10)
    y.SetString(sy, 10)
    z := pow(x, y)
    fmt.Println(z)
}