C1231321123223331211111131211113313331333132313332323232211222112121   >>    C123132112322333121111113121111331333133313231333232323221122211212   <<    C1231321123223331211111131211113313331333132313332323232211222112123   >>      C1231321123223331211111131211113313331333132313332323232211222112122   >>