C312312111111331312111133133313331333133313231333133112111133133313331323211221   >>    C31231211111133131211113313331333133313331323133313311211113313331333132321122   <<    C312312111111331312111133133313331333133313231333133112111133133313331323211223   >>      C312312111111331312111133133313331333133313231333133112111133133313331323211222   >>