-er -ic a-a a-b a-c a-i a-t aaa aab aac aae aai aam aao aar aas aat ab- aba abb abc abe abi abm abo abr abs abt ac- aca acb acc ace aci acm aco acr acs act aea aeb aec aee aei aem aeo aer aes aet ai- aia aib aic aie aii aim aio air ais ait ama amb amc ame ami amm amo amr ams amt aoa aob aoc aoe aoi aom aoo aor aos aot ar- ara arb arc are ari arm aro arr ars art as- asa asb asc ase asi asm aso asr ass ast at- ata atb atc ate ati atm ato atr ats att baa bab bac bae bai bam bao bar bas bat bba bbb bbc bbe bbi bbm bbo bbr bbs bbt bca bcb bcc bce bci bcm bco bcr bcs bct be- bea beb bec bee bei bem beo ber bes bet bi- bia bib bic bie bii bim bio bir bis bit bma bmb bmc bme bmi bmm bmo bmr bms bmt boa bob boc boe boi bom boo bor bos bot bra brb bre bri brm bro brr brs brt bsa bsb bsc bse bsi bsm bso bsr bss bst bta btb btc bte bti btm bto btr bts btt c-- caa cab cac cae cai cam cao car cas cat cba cbb cbc cbe cbi cbm cbo cbr cbs cbt cca ccb ccc cce cci ccm cco ccr ccs cct ce- cea ceb cec cee cei cem ceo cer ces cet ci- cia cib cic cie cii cim cio cir cis cit cma cmb cmc cme cmi cmm cmo cmr cms cmt co- coa cob coc coe coi com coo cor cos cot cra crb crc cre cri crm cro crr crs crt csa csb csc cse csi csm cso csr css cst cta ctb ctc cte cti ctm cto ctr cts ctt eaa eab eac eae eai eam eao ear eas eat eba ebb ebc ebe ebi ebm ebo ebr ebs ebt ec- eca ecb ecc ece eci ecm eco ecr ecs ect eea eeb eec eee eem eeo eer ees eet eia eib eic eie eii eim eio eir eis eit em- ema emb emc eme emi emm emo emr ems emt eo- eoa eob eoc eoe eoi eom eoo eor eos eot era erb erc ere eri erm ero err ers ert es- esa esb esc ese esi esm eso esr ess est eta etb etc ete eti etm eto etr ets ett ia- iaa iab iac iae iai iam iao iar ias iat iba ibb ibc ibe ibi ibm ibo ibr ibs ibt ica icb icc ice ici icm ico icr ics ict ie- iea iec iee iei iem ier ies iet iia iib iic iie iii iim iio iir iis iit im- ima imb imc ime imi imm imo ims imt io- ioa iob ioc ioe ioi iom ioo ior ios iot ir- ira irb irc ire iri irm iro irr irs irt is- isa isb isc ise isi ism iso isr iss ist ita itb itc ite iti itm ito its itt m-o m-r maa mab mac mae mai mam mao mar mas mat mba mbb mbc mbe mbi mbm mbo mbr mbs mbt mc- mca mcb mcc mce mci mcm mco mcr mcs mct mea meb mec mee mei mem meo mer mes met mi- mia mib mic mie mii mim mio mir mis mit mma mmb mmc mme mmi mmm mmo mmr mms mmt moa mob moc moe moi mom moo mor mos mot mra mrb mrc mre mri mrm mro mrr mrs mrt msa msb msc mse msi msm mso msr mss mst mta mtb mtc mte mti mtm mto mtr mts mtt o-i oaa oab oac oae oai oam oao oar oas oat ob- oba obb obc obe obi obm obo obr obs obt oc- oca ocb occ oci ocm oco ocr ocs oct oea oeb oec oee oei oem oeo oer oes oet oia oib oic oie oii oim oio oir ois oit om- oma omb omc ome omi omm omo omr oms omt oo- ooa oob ooc ooi oom ooo oor oos oot or- ora orb orc ore ori orm oro orr ors ort os- osa osb osc ose osi osm oso osr oss ost ot- ota otb otc ote oti otm oto otr ots ott ra- raa rab rac rae rai ram rao rar ras rat rba rbb rbc rbe rbi rbm rbo rbr rbs rbt rca rcb rcc rce rci rcm rco rcr rcs rct re- rea reb rec ree rei rem reo rer res ret ria rib ric rie rii rim rio rir ris rit rma rmb rmc rme rmi rmm rmo rmr rms rmt roa rob roc roe roi rom roo ror ros rot rra rrb rrc rri rrm rrr rrs rrt rsa rsb rsc rse rsi rsm rso rsr rss rst rta rtb rtc rte rti rtm rto rtr rts rtt saa sab sac sae sai sam sao sar sas sat sba sbb sbc sbe sbi sbm sbo sbr sbs sbt sca scb scc sce sci scm sco scr scs sct se- sea seb sec see sei sem seo ser ses set sia sib sic sie sii sim sio sir sis sit sma smb smc sme smi smm smo smr sms smt soa sob soc soe soi som soo sor sos sot sr- sra srb src sre sri srm sro srr srs srt ss- ssa ssb ssc sse ssi ssm sso ssr sss sst sta stb stc ste sti stm sto str sts stt taa tab tac tae tai tam tao tar tas tat tba tbb tbc tbe tbi tbm tbo tbr tbs tbt tca tcb tcc tce tci tcm tco tcr tcs tct te- tea teb tec tee tei tem teo ter tes tet tia tib tic tie tii tim tio tir tis tit tma tmb tmc tme tmi tmm tmo tmr tms tmt to- toa tob