C11231323321111331312111133133313331323223313231333131133132213112121   >>    C1123132332111133131211113313331333132322331323133313113313221311212   <<    C11231323321111331312111133133313331323223313231333131133132213112123   >>      C11231323321111331312111133133313331323223313231333131133132213112122   >>