C1231321123223331211111131211113313331333132313331333232233121222111312121   >>    C123132112322333121111113121111331333133313231333133323223312122211131212   <<    C1231321123223331211111131211113313331333132313331333232233121222111312123   >>      C1231321123223331211111131211113313331333132313331333232233121222111312122   >>