C11231323321111331312111133133313331323223313231333131133132313331333132322311   >>    C1123132332111133131211113313331333132322331323133313113313231333133313232231   <<    C11231323321111331312111133133313331323223313231333131133132313331333132322313   >>      C11231323321111331312111133133313331323223313231333131133132313331333132322312   >>