C11112331312111112111133133313231333132313232233131133131133223221   >>    C1111233131211111211113313331323133313231323223313113313113322322   <<    C11112331312111112111133133313231333132313232233131133131133223223   >>      C11112331312111112111133133313231333132313232233131133131133223222   >>