C1231321123223331211111131211113313331333133313223223312213233121321   >>    C123132112322333121111113121111331333133313331322322331221323312132   <<    C1231321123223331211111131211113313331333133313223223312213233121323   >>      C1231321123223331211111131211113313331333133313223223312213233121322   >>