-er -ic a-a a-c a-i a-t aaa aac aae aai aao aar aat ac- aca acc ace aci aco acr act aea aec aee aei aeo aer aet ai- aia aic aie aii aio air ait aoa aoc aoe aoi aoo aor aot ar- ara arc are ari aro arr art at- ata atc ate ati ato atr att c-- caa cac cae cai cao car cat cca ccc cce cci cco ccr cct ce- cea cec cee cei ceo cer cet ci- cia cic cie cii cio cir cit co- coa coc coe coi coo cor cot cra crc cre cri cro crr crt cta ctc cte cti cto ctr ctt eaa eac eae eai eao ear eat ec- eca ecc ece eci eco ecr ect eea eec eee eeo eer eet eia eic eie eii eio eir eit eo- eoa eoc eoe eoi eoo eor eot era erc ere eri ero err ert eta etc ete eti eto etr ett ia- iaa iac iae iai iao iar iat ica icc ice ici ico icr ict ie- iea iec iee iei ier iet iia iic iie iii iio iir iit io- ioa ioc ioe ioi ioo ior iot ir- ira irc ire iri iro irr irt ita itc ite iti ito itt o-i oaa oac oae oai oao oar oat oc- oca occ oci oco ocr oct oea oec oee oei oeo oer oet oia oic oie oii oio oir oit oo- ooa ooc ooi ooo oor oot or- ora orc ore ori oro orr ort ot- ota otc ote oti oto otr ott ra- raa rac rae rai rao rar rat rca rcc rce rci rco rcr rct re- rea rec ree rei reo rer ret ria ric rie rii rio rir rit roa roc roe roi roo ror rot rra rrc rri rrr rrt rta rtc rte rti rto rtr rtt taa tac tae tai tao tar tat tca tcc tce tci tco tcr tct te- tea tec tee tei teo ter tet tia tic tie tii tio tir tit to- toa toc toe toi too tor tot tra trc tre tri tro trr trt tta ttc tte tti tto ttr ttt