C11111333133313232233133313331333133112111112113313113121111121111331333121221   >>    C1111133313331323223313331333133313311211111211331311312111112111133133312122   <<    C11111333133313232233133313331333133112111112113313113121111121111331333121223   >>      C11111333133313232233133313331333133112111112113313113121111121111331333121222   >>