C11231323321111331312111133133313331323223313231333131323221211   >>    C1123132332111133131211113313331333132322331323133313132322121   <<    C11231323321111331312111133133313331323223313231333131323221213   >>      C11231323321111331312111133133313331323223313231333131323221212   >>