C1231321123223331211111131211113313331333133313223223312223113211   >>    C123132112322333121111113121111331333133313331322322331222311321   <<    C1231321123223331211111131211113313331333133313223223312223113213   >>      C1231321123223331211111131211113313331333133313223223312223113212   >>