C11231323321111331312111133133313331323223313231333131133132222121   >>    C1123132332111133131211113313331333132322331323133313113313222212   <<    C11231323321111331312111133133313331323223313231333131133132222123   >>      C11231323321111331312111133133313331323223313231333131133132222122   >>