C11112331312111112111133132313331333133313232212111133133112111133221232311   >>    C1111233131211111211113313231333133313331323221211113313311211113322123231   <<    C11112331312111112111133132313331333133313232212111133133112111133221232313   >>      C11112331312111112111133132313331333133313232212111133133112111133221232312   >>