-er -ic c-- ccc cce cci cck cco ccr ccu ccv ce- cec cee cei cek ceo cer ceu cev ci- cic cie cii cik cio cir ciu civ ckc cki cko co- coc coe coi cok coo cor cou cov crc cre cri crk cro crr cru crv cuc cue cui cuk cuo cur cuu cuv cvc cve cvi cvk cvo cvr cvu cvv ec- ecc ece eci eck eco ecr ecu ecv eec eee eek eeo eer eev eic eie eii eik eio eir eiu eiv ekc eke eki eko ekr eku ekv eo- eoc eoe eoi eok eoo eor eou erc ere eri erk ero err eru erv eu- euc eue eui eur euv evc eve evi evo evr evv i-v icc ice ici ick ico icr icu icv ie- iec iee iei iek ier iev iic iie iii iio iir iiu ikc ike iki ikk iko ikr iku ikv io- ioc ioe ioi ioo ior iou iov ir- irc ire iri irk iro irr iru irv iu- iuc iue iui iur ivc ive ivi ivo ivr ivu ivv kcc kce kci kck kcr kcu ke- kec kee kei kek keo ker kev kic kie kii kik kio kir kiu kiv kkc kke kki kkk kkr kku kkv koc koe koi kok koo kor kou krc kri krk kro krr kru krv kuc kue kui kuk kur kuu kvi kvk kvo kvr kvv o-i oc- occ oci ock oco ocr ocu ocv oec oee oei oeo oer oic oie oii oik oio oir oiu oiv okc oke oki okk oko okr oku oo- ooc ooi ook ooo oor oov or- orc ore ori ork oro orr oru orv ou- ouc oue oui ouk ouo our ov- ovc ove ovi ovo ovv rcc rce rci rco rcr rcu rcv re- rec ree rei rek reo rer reu rev ric rie rii rik rio rir riv rkc rke rkk rko rku rkv roc roe roi rok roo ror rou rov rrc rri rrk rrr rru ruc rue rui ruk ruo rur ruu ruv rvc rve rvi rvo rvr rvu rvv ucc uce uci uck uco ucr ucu ucv uec uee uei uer uic uie uii uio uir uiu ukc uke uki ukk ukr uku uoc uoe uok uoo uor ur- urc ure uri urk uro urr uru uuc uue uur uuu uvc uve uvo uvu uvv v-e vcc vce vci vco vcr vcu vec vee vei vek veo ver veu vi- vic vie vii vik vio vir viu viv voc voe voi vok voo vor vou vov vrc vre vri vrk vrr vru vue vuk vur vuv vvc vvi vvo vvr vvv