C11112331312111112111133133313331333133313113233231333132323322121   >>    C1111233131211111211113313331333133313331311323323133313232332212   <<    C11112331312111112111133133313331333133313113233231333132323322123   >>      C11112331312111112111133133313331333133313113233231333132323322122   >>