cccc ccci ccic ccii ccir ccix ccoc ccrc ccri ccrt cctc cctt ccxi cicc cici cico cicr cict ciii ciit cior circ ciri ciro cirr cirt citi cito citt cixi coco coct coir coit coix coot cor- corc cori coro corr cort cotc coti coto cott crcc crcr cric crit croc croo cror crot crrt crtc ctic ctor ctot ctrc cxii cxix cxro cxxi cxxx iccc icci icco iccr icct icoc icor icrc icrr icrt iiii iiio iiit iioi iioo iirc iitr iitt ioci ioii ioio ioit iooi iooo iori ioto ircc ircx iri- iric irio irix iroc irrc irri irti itic itoi itoo itor itri itto ixxi occc occi occt ocro ocrr oct- octi octo oici oiii oirt oitc oiti oocr oooo oort orci orco ori- oric orio orit orix oro- oror orot orri orro ortc orto otic otit oto- otoo otor otro otti otto oxi- oxic oxo- oxox oxxo rccc rcic rctc rcti ricc rico rict riot riri riti rito ritt rixc rixo rocc roco roio roir roit rooi roor root roox rorc rori roro rort rotc roti roto rotr rott roxo rrrr rtcc tccc tctc ticc tico tiit tiri tiro tirr titc titi tito titt tixt toci toco toit toor toot torc tori toro torr tort torx totc toti toto totr tott tox- toxi toxo toxt trcc tri- tric trio trit trix troc troi troo trot trox trtc trtr tttt txii txtr xcii xcri xico xiii xito xixi xoco xoro xoxo xtro xxii xxix xxxi xxxo xxxx