cccc cccm ccmc ccmm ccoc ccom ccrc ccrt cctc cctt cmcc cmmc cmoc cmot cmrr cmtc coco coct com- comc comm como comr coom coot cor- corc corm coro corr cort cotc coto cott crcc crcr crmo croc crom croo cror crot crrt crtc crtm ctmo ctor ctot ctrc ctrm mccc mcmc mcmt mcot mcrc mctc mmcc mmcm mmct mmmc mmmm mmor mmrc moco momo mooc moor moot moro mort motm moto mott mr-c mrcc mrmc mrrc mrtm mrtt mtcr mtom mtor mtrc mtrr mttr occc occt ocom ocro ocrr oct- octo omo- omoo omor omro oocr oooo oort orco ormo oro- orom oror orot orro ortc orto oto- otoo otor otro otto rccc rctc rocc roco romm romo room roor root rorc roro rort rotc roto rotr rott rrmc rrrr rtcc rtcm rtmc t-mo tccc tcom tctc tmcc tmcm tmro tmtt toco tomm tomo tomt toom toor toot torc torm toro torr tort totc totm toto totr tott trcc troc trom troo trot trtc trtr tttt