-er -ic c-- ccc cce cci cco ccr cct ccu ce- cec cee cei ceo cer cet ceu ci- cic cie cii cio cir cit ciu co- coc coe coi coo cor cot cou crc cre cri cro crr crt cru ctc cte cti cto ctr ctt ctu cuc cue cui cuo cur cut cuu ec- ecc ece eci eco ecr ect ecu eec eee eeo eer eet eic eie eii eio eir eit eiu eo- eoc eoe eoi eoo eor eot eou erc ere eri ero err ert eru etc ete eti eto etr ett etu eu- euc eue eui eur eut icc ice ici ico icr ict icu ie- iec iee iei ier iet iic iie iii iio iir iit iiu io- ioc ioe ioi ioo ior iot iou ir- irc ire iri iro irr irt iru itc ite iti ito itt itu iu- iuc iue iui iur iut o-i oc- occ oci oco ocr oct ocu oec oee oei oeo oer oet oic oie oii oio oir oit oiu oo- ooc ooi ooo oor oot or- orc ore ori oro orr ort oru ot- otc ote oti oto otr ott otu ou- ouc oue oui ouo our out rcc rce rci rco rcr rct rcu re- rec ree rei reo rer ret reu ric rie rii rio rir rit roc roe roi roo ror rot rou rrc rri rrr rrt rru rtc rte rti rto rtr rtt rtu ruc rue rui ruo rur rut ruu tcc tce tci tco tcr tct tcu te- tec tee tei teo ter tet teu tic tie tii tio tir tit tiu to- toc toe toi too tor tot tou trc tre tri tro trr trt tru ttc tte tti tto ttr ttt ttu tuc tue tui tuo tur tut tuu ucc uce uci uco ucr uct ucu uec uee uei uer uet uic uie uii uio uir uit uiu uoc uoe uoo uor uot ur- urc ure uri uro urr urt uru utc ute uti uto utr utt utu uuc uue uur uut uuu