C1231321123223331211111131211113313331333132313332323232211222311121   >>    C123132112322333121111113121111331333133313231333232323221122231112   <<    C1231321123223331211111131211113313331333132313332323232211222311123   >>      C1231321123223331211111131211113313331333132313332323232211222311122   >>