3, 8, 12, 17, 25, 30, 41, 43,
	9, 11, 18, 24, 31, 40, 44, 53,
	10, 19, 23, 32, 39, 45, 52, 54,
	20, 22, 33, 38, 46, 51, 55, 60,
	21, 34, 37, 47, 50, 56, 59, 61,
	35, 36, 48, 49, 57, 58, 62, 63,
}

func TestZigUnzig(t *testing.T) {
	for i := 0; i < blockSize; i++ {
		if unzig[zigzag[i]] != i {
			t.Errorf("unzig[zigzag[%d]] == %d", i, unzig[zigzag[i]])
		}
		if zigzag[unzig[i]] != i {