C1111233131211111211113313331333133313331312211111133133313332322331221   >>    C111123313121111121111331333133313331333131221111113313331333232233122   <<    C1111233131211111211113313331333133313331312211111133133313332322331223   >>      C1111233131211111211113313331333133313331312211111133133313332322331222   >>