C1111233131211111211113313331333133313331122212111111331333132332321311   >>    C111123313121111121111331333133313331333112221211111133133313233232131   <<    C1111233131211111211113313331333133313331122212111111331333132332321313   >>      C1111233131211111211113313331333133313331122212111111331333132332321312   >>