-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aaf aai aam aao aar aat ab- aba abb abc abe abf abi abm abo abr abt ac- aca acb acc ace acf aci acm aco acr act aea aeb aec aee aef aei aem aeo aer aet af- afa afb afc afe aff afi afm afo afr aft ai- aia aib aic aie aif aii aim aio air ait ama amb amc ame amf ami amm amo amr amt aoa aob aoc aoe aof aoi aom aoo aor aot ar- ara arb arc are arf ari arm aro arr art at- ata atb atc ate atf ati atm ato atr att baa bab bac bae baf bai bam bao bar bat bba bbb bbc bbe bbf bbi bbm bbo bbr bbt bca bcb bcc bce bcf bci bcm bco bcr bct be- bea beb bec bee bef bei bem beo ber bet bfa bfb bfc bfe bff bfi bfm bfo bfr bft bi- bia bib bic bie bif bii bim bio bir bit bma bmb bmc bme bmf bmi bmm bmo bmr bmt boa bob boc boe bof boi bom boo bor bot bra brb bre brf bri brm bro brr brt bta btb btc bte btf bti btm bto btr btt c-- caa cab cac cae caf cai cam cao car cat cba cbb cbc cbe cbf cbi cbm cbo cbr cbt cca ccb ccc cce ccf cci ccm cco ccr cct ce- cea ceb cec cee cef cei cem ceo cer cet cfa cfb cfc cfe cff cfi cfm cfo cfr cft ci- cia cib cic cie cif cii cim cio cir cit cma cmb cmc cme cmf cmi cmm cmo cmr cmt co- coa cob coc coe cof coi com coo cor cot cra crb crc cre crf cri crm cro crr crt cta ctb ctc cte ctf cti ctm cto ctr ctt eaa eab eac eae eaf eai eam eao ear eat eba ebb ebc ebe ebf ebi ebm ebo ebr ebt ec- eca ecb ecc ece ecf eci ecm eco ecr ect eea eeb eec eee eef eem eeo eer eet ef- efa efb efc efe eff efi efm efo efr eft eia eib eic eie eif eii eim eio eir eit em- ema emb emc eme emf emi emm emo emr emt eo- eoa eob eoc eoe eof eoi eom eoo eor eot era erb erc ere erf eri erm ero err ert eta etb etc ete etf eti etm eto etr ett faa fab fac fae faf fai fam fao far fat fba fbb fbc fbe fbf fbi fbm fbo fbr fbt fca fcb fcc fce fcf fci fcm fco fcr fct fea feb fec fee fef fei fem feo fer fet ffa ffc ffe fff ffi ffm ffo ffr fft fia fib fic fie fif fii fim fir fit fma fmb fmc fme fmf fmi fmm fmo fmr fmt foa fob foc foe fof foi fom foo for fot fra frb frc fre frf fri frm fro frr frt fta ftb ftc fte ftf fti ftm fto ftr ftt i-f ia- iaa iab iac iae iaf iai iam iao iar iat iba ibb ibc ibe ibf ibi ibm ibo ibr ibt ica icb icc ice icf ici icm ico icr ict ie- iea iec iee ief iei iem ier iet ifa ifb ifc ife iff ifi ifm ifo ifr ift iia iib iic iie iif iii iim iio iir iit im- ima imb imc ime imf imi imm imo imt io- ioa iob ioc ioe iof ioi iom ioo ior iot ir- ira irb irc ire irf iri irm iro irr irt ita itb itc ite itf iti itm ito itt m-f m-o m-r maa mab mac mae maf mai mam mao mar mat mba mbb mbc mbe mbf mbi mbm mbo mbr mbt mc- mca mcb mcc mce mcf mci mcm mco mcr mct mea meb mec mee mef mei mem meo mer met mfa mfb mfc mfe mff mfi mfm mfo mfr mft mi- mia mib mic mie mif mii mim mio mir mit mma mmb mmc mme mmf mmi mmm mmo mmr mmt moa mob moc moe mof moi mom moo mor mot mra mrb mrc mre mrf mri mrm mro mrr mrt mta mtb mtc mte mtf mti mtm mto mtr mtt o-i oaa oab oac oae oaf oai oam oao oar oat ob- oba obb obc obe obf obi obm obo obr obt oc- oca ocb occ ocf oci ocm oco ocr oct oea oeb oec oee oef oei oem oeo oer oet of- ofa ofb ofc ofe off ofi ofm ofo ofr oft oia oib oic oie oif oii oim oio oir oit om- oma omb omc ome omf omi omm omo omr omt oo- ooa oob ooc oof ooi oom ooo oor oot or- ora orb orc ore orf ori orm oro orr ort ot- ota otb otc ote otf oti otm oto otr ott ra- raa rab rac rae raf rai ram rao rar rat rba rbb rbc rbe rbf rbi rbm rbo rbr rbt rca rcb rcc rce rcf rci rcm rco rcr rct re- rea reb rec ree ref rei rem reo rer ret rfa rfb rfc rfe rff rfi rfm rfo rfr rft ria rib ric rie rif rii rim rio rir rit rma rmb rmc rme rmf rmi rmm rmo rmr rmt roa rob roc roe rof roi rom roo ror rot rra rrb rrc rrf rri rrm rrr rrt rta rtb rtc rte rtf rti rtm rto rtr rtt taa tab tac tae taf tai tam tao tar tat tba tbb tbc tbe tbf tbi tbm tbo tbr tbt tca tcb tcc tce tcf tci tcm tco tcr tct te- tea teb tec tee tef tei tem teo ter tet tfa tfb tfc tfe tff tfi tfm tfo tfr tft tia tib tic tie tif tii tim tio tir tit tma tmb tmc tme tmf tmi tmm