func CreateRandom(bs []byte, length int) []byte {
	filled := make([]byte, length)
	max := len(bs)

	for i := 0; i < length; i++ {
		Shuffle(bs)
		filled[i] = bs[random(0, max)]
	}

	return filled
}
func CreateRandom(bs []byte, length int) []byte {
	filled := make([]byte, length)
	max := len(bs)

	for i := 0; i < length; i++ {
		Shuffle(bs)
		filled[i] = bs[random(0, max)]
	}

	return filled
}
// CreateRandom returns a random byte string of given length from given byte string