C11111333133313232233133313331333133112111112113313331311331333121111211321   >>    C1111133313331323223313331333133313311211111211331333131133133312111121132   <<    C11111333133313232233133313331333133112111112113313331311331333121111211323   >>      C11111333133313232233133313331333133112111112113313331311331333121111211322   >>