-er -ic c-- ccc cce cci cck cco ccr cct ccu ce- cec cee cei cek ceo cer cet ceu ci- cic cie cii cik cio cir cit ciu ckc cki cko ckt co- coc coe coi cok coo cor cot cou crc cre cri crk cro crr crt cru ctc cte cti ctk cto ctr ctt ctu cuc cue cui cuk cuo cur cut cuu ec- ecc ece eci eck eco ecr ect ecu eec eee eek eeo eer eet eic eie eii eik eio eir eit eiu ekc eke eki eko ekr ekt eku eo- eoc eoe eoi eok eoo eor eot eou erc ere eri erk ero err ert eru etc ete eti etk eto etr ett etu eu- euc eue eui eur eut icc ice ici ick ico icr ict icu ie- iec iee iei iek ier iet iic iie iii iio iir iit iiu ikc ike iki ikk iko ikr ikt iku io- ioc ioe ioi ioo ior iot iou ir- irc ire iri irk iro irr irt iru itc ite iti itk ito itt itu iu- iuc iue iui iur iut k-t kcc kce kci kck kcr kct kcu ke- kec kee kei kek keo ker ket kic kie kii kik kio kir kit kiu kkc kke kki kkk kkr kkt kku koc koe koi kok koo kor kot kou krc kri krk kro krr krt kru ktc kte ktk kto ktr ktt ktu kuc kue kui kuk kur kut kuu o-i oc- occ oci ock oco ocr oct ocu oec oee oei oeo oer oet oic oie oii oik oio oir oit oiu okc oke oki okk oko okr oku oo- ooc ooi ook ooo oor oot or- orc ore ori ork oro orr ort oru ot- otc ote oti otk oto otr ott otu ou- ouc oue oui ouk ouo our out rcc rce rci rco rcr rct rcu re- rec ree rei rek reo rer ret reu ric rie rii rik rio rir rit rkc rke rkk rko rkt rku roc roe roi rok roo ror rot rou rrc rri rrk rrr rrt rru rtc rte rti rtk rto rtr rtt rtu ruc rue rui ruk ruo rur rut ruu tcc tce tci tck tco tcr tct tcu te- tec tee tei tek teo ter tet teu tic tie tii tik tio tir tit tiu tkc tke tkk tko tkr tkt to- toc toe toi tok too tor tot tou trc tre tri trk tro trr trt tru ttc tte tti ttk tto ttr ttt ttu tuc tue tui tuk tuo tur tut tuu ucc uce uci uck uco ucr uct ucu uec uee uei uer uet uic uie uii uio uir uit uiu ukc uke uki ukk ukr uku uoc uoe uok uoo uor uot ur- urc ure uri urk uro urr urt uru utc ute uti utk uto utr utt utu uuc uue uur uut uuu