C1111233131211111211113313331333133313211231211331323133313331322211232321   >>    C111123313121111121111331333133313331321123121133132313331333132221123232   <<    C1111233131211111211113313331333133313211231211331323133313331322211232323   >>      C1111233131211111211113313331333133313211231211331323133313331322211232322   >>