C1231321123223331211111131211113313331333132332132333233313211223211   >>    C123132112322333121111113121111331333133313233213233323331321122321   <<    C1231321123223331211111131211113313331333132332132333233313211223213   >>      C1231321123223331211111131211113313331333132332132333233313211223212   >>