C11112331312111112111133133313331333132323133313331333131113231322123231   >>    C1111233131211111211113313331333133313232313331333133313111323132212323   <<    C11112331312111112111133133313331333132323133313331333131113231322123233   >>      C11112331312111112111133133313331333132323133313331333131113231322123232   >>