cccc ccci ccee ccic ccii ccir ccoc ccrc ccre ccri ccrt cctc cctt cec- cece ceci ceco cect ceec ceor cer- cerc cere ceri cero cert cet- cete ceti ceto cicc cici cico cicr cict ciee cier ciii ciit cior circ cire ciri ciro cirr cirt cite citi cito citt coce coco coct coir coit coot cor- corc core cori coro corr cort cotc cote coti coto cott crcc crce crcr cre- crec cree crei creo cret cric crie crit croc croe croo cror crot crrt crtc ctec ctic ctor ctot ctrc eccc ecce ecci ecco ecct ecit eco- ecot ecrc ecri ecrr ect- ectc ecto eeee eeoc eerc eero eetc eete eico eiec eiei eier eire eitc eiti eito eitr eoir eore eori eotc eoto ercc erce erec erei erer eret eric erie erio erit eroc eroe eroi eroo errc erre erro etcc etco etec etee eter etic etio etoe etre etro ette etti etto iccc icci icco iccr icct icec icee icer icet icoc icor icrc icre icrr icrt iecc ieet ieie ieio iere ieri iett iiie iiii iiio iiit iioi iioo iirc iitr iitt ioci ioee ioii ioio ioit iooi iooo iore iori iote ioto ircc iree irer iri- iric irie irio iroc irrc irre irri irte irti itec iter itet itic itie itoi itoo itor itri itto o-eo occc occi occt oce ocee ocet ocre ocro ocrr oct- octe octi octo oec- oecc oeec oere oeti oici oier oiii oire oirt oitc oiti oocr ooer oooo oore oort orce orci orco ore- orec oreo orer ori- oric orie orio orit oro- oroe oror orot orri orro ortc orte orto otee oter otic otit oto- otoe otoo otor otre otro otte otti otto rccc rcet rcic rctc rcti recc rece reci recr rect reet reii reir reit reot rere reri rero rert rete reti reto retr rett ricc rice rico rict rier riet riot rire riri rite riti rito ritt rocc roce roco roer roet roio roir roit rooi roor root rorc rore rori roro rort rotc rote roti roto rotr rott rrrr rtcc rtce rtee rtei tccc tctc teco tecr tect teec teer teet teic teie teir teor ter- terc tere teri tero terr tete teti teto tetr tett ticc tice tico tie- tiee tiei tieo tier tiet tiit tire tiri tiro tirr titc tite titi tito titt toce toci toco toee toei toer toet toie toit toor toot torc tore tori toro torr tort totc tote toti toto totr tott trcc tre- trec tree trei treo tret tri- tric trie trio trit troc troe troi troo trot trtc trte trtr tteo tter ttoe tttt