C11112331312111112111133133313331333133313123313331312111113331333123213133221   >>    C1111233131211111211113313331333133313331312331333131211111333133312321313322   <<    C11112331312111112111133133313331333133313123313331312111113331333123213133223   >>      C11112331312111112111133133313331333133313123313331312111113331333123213133222   >>