cccc ccee ccoc ccrc ccre ccrt cctc cctt cec- cece ceco cect ceec ceor cer- cerc cere cero cert cet- cete ceto ceze coce coco coct coot cor- corc core coro corr cort cotc cote coto cott coze cozz crcc crce crcr crcz cre- crec cree creo cret croc croe croo cror crot croz crrt crtc ctec ctor ctot ctrc eccc ecce ecco ecct eco- ecot ecrc ecrr ect- ectc ecto eeee eeoc eerc eero eetc eete eeze eore eotc eoto ercc erce erec erer eret erez eroc eroe eroo errc erre erro ertz etcc etco etec etee eter etoe etre etro ette etto ezer ezzo o-eo occc occt oce ocee ocet ocre ocro ocrr oct- octe octo oec- oecc oeec oere oetz oocr ooer oooo oore oort ooze orce orco ore- orec oreo orer oro- oroe oror orot oroz orro ortc orte orto orzo otee oter oto- otoe otoo otor otre otro otte otto ozee ozer ozet rccc rcet rctc recc rece recr rect recz reet reot rere rero rert rete reto retr rett retz reze rocc roce roco roer roet roor root rooz rorc rore roro rort rotc rote roto rotr rott roze rozz rrrr rtcc rtce rtee tccc tctc teco tecr tect teec teer teet teez teor teoz ter- terc tere tero terr tete teto tetr tett tetz tezz toce toco toee toer toet toor toot torc tore toro torr tort totc tote toto totr tott toze tozo trcc tre- trec tree treo tret trez troc troe troo trot trtc trte trtr tteo tter ttoe tttt tzzt z-ro zero zert zete zeto zeze zoco zoet zoo- zoot zorc zore zoro zort zote zott zotz zozo zrce zrze zzzz