C11231323321111331312111133133313331323223313231333131133132232211   >>    C1123132332111133131211113313331333132322331323133313113313223221   <<    C11231323321111331312111133133313331323223313231333131133132232213   >>      C11231323321111331312111133133313331323223313231333131133132232212   >>