C11112331312111112111133133313231333132313232233131133131322121   >>    C1111233131211111211113313331323133313231323223313113313132212   <<    C11112331312111112111133133313231333132313232233131133131322123   >>      C11112331312111112111133133313231333132313232233131133131322122   >>