C11112331312111112111133133313331333132323133313331333133313123231121321   >>    C1111233131211111211113313331333133313232313331333133313331312323112132   <<    C11112331312111112111133133313331333132323133313331333133313123231121323   >>      C11112331312111112111133133313331333132323133313331333133313123231121322   >>