C312312111111331312111133133313231333133313112331333133112111133132233111   >>    C31231211111133131211113313331323133313331311233133313311211113313223311   <<    C312312111111331312111133133313231333133313112331333133112111133132233113   >>      C312312111111331312111133133313231333133313112331333133112111133132233112   >>