C11111333133313232233133313331333133112111112113313123231323132321   >>    C1111133313331323223313331333133313311211111211331312323132313232   <<    C11111333133313232233133313331333133112111112113313123231323132323   >>      C11111333133313232233133313331333133112111112113313123231323132322   >>