C11112331312111112111133133313331333132313123133313232213232223321   >>    C1111233131211111211113313331333133313231312313331323221323222332   <<    C11112331312111112111133133313331333132313123133313232213232223323   >>      C11112331312111112111133133313331333132313123133313232213232223322   >>