C31231211113313121211113313331333133313311211331333132231133132221   >>    C3123121111331312121111331333133313331331121133133313223113313222   <<    C31231211113313121211113313331333133313311211331333132231133132223   >>      C31231211113313121211113313331333133313311211331333132231133132222   >>