C11112331312111112111133132313331333133313233313331333132212132332132313121   >>    C1111233131211111211113313231333133313331323331333133313221213233213231312   <<    C11112331312111112111133132313331333133313233313331333132212132332132313123   >>      C11112331312111112111133132313331333133313233313331333132212132332132313122   >>