C11112331312111112111133133313331333132323133313331333222212121   >>    C1111233131211111211113313331333133313232313331333133322221212   <<    C11112331312111112111133133313331333132323133313331333222212123   >>      C11112331312111112111133133313331333132323133313331333222212122   >>