C11231323321111331312111133133313331323223313231333131133112113312121   >>    C1123132332111133131211113313331333132322331323133313113311211331212   <<    C11231323321111331312111133133313331323223313231333131133112113312123   >>      C11231323321111331312111133133313331323223313231333131133112113312122   >>