C1111233131211111211113313231333133313331323331333133313232233211221133121   >>    C111123313121111121111331323133313331333132333133313331323223321122113312   <<    C1111233131211111211113313231333133313331323331333133313232233211221133123   >>      C1111233131211111211113313231333133313331323331333133313232233211221133122   >>