C1231321123223331211111131211113313331333132313331333232233121222122311233221   >>    C123132112322333121111113121111331333133313231333133323223312122212231123322   <<    C1231321123223331211111131211113313331333132313331333232233121222122311233223   >>      C1231321123223331211111131211113313331333132313331333232233121222122311233222   >>