-er a-a a-b a-i aaa aab aad aae aai aam aao aar aas ab- aba abb abd abe abi abm abo abr abs ad- ada adb add ade adi adm ado adr ads aea aeb aed aee aei aem aeo aer aes ai- aia aib aid aie aii aim aio air ais ama amb amd ame ami amm amo amr ams aoa aob aod aoe aoi aom aoo aor aos ar- ara arb ard are ari arm aro arr ars as- asa asb asd ase asi asm aso asr ass baa bab bad bae bai bam bao bar bas bba bbb bbd bbe bbi bbm bbo bbr bbs bda bdb bdd bde bdi bdm bdo bdr bds be- bea beb bed bee bei bem beo ber bes bi- bia bib bid bie bii bim bio bir bis bma bmb bmd bme bmi bmm bmo bmr bms boa bob bod boe boi bom boo bor bos bra brb brd bre bri brm bro brr brs bsa bsb bsd bse bsi bsm bso bsr bss daa dab dad dae dai dam dao dar das dba dbb dbd dbe dbi dbm dbo dbr dbs dda ddb ddd dde ddi ddm ddo ddr dds de- dea deb ded dee dei dem deo der des di- dia dib did die dii dim dio dir dis dma dmb dmd dme dmi dmm dmo dmr dms doa dob dod doe doi dom doo dor dos dra drb drd dre dri drm dro drr drs dsa dsb dsd dse dsi dsm dso dsr dss eaa eab ead eae eai eam eao ear eas eba ebb ebd ebe ebi ebm ebo ebr ebs ed- eda edb edd ede edi edm edo edr eds eea eeb eed eee eem eeo eer ees eia eib eid eie eii eim eio eir eis em- ema emb emd eme emi emm emo emr ems eo- eoa eob eod eoe eoi eom eoo eor eos era erb erd ere eri erm ero err ers es- esa esb esd ese esi esm eso esr ess i-d ia- iaa iab iad iae iai iam iao iar ias iba ibb ibd ibe ibi ibm ibo ibr ibs ida idb idd ide idi idm ido idr ids ie- iea ied iee iei iem ier ies iia iib iid iie iii iim iio iir iis im- ima imb imd ime imi imm imo ims io- ioa iob iod ioe ioi iom ioo ior ios ir- ira irb ird ire iri irm iro irr irs is- isa isb isd ise isi ism iso isr iss m-o m-r maa mab mad mae mai mam mao mar mas mba mbb mbd mbe mbi mbm mbo mbr mbs mda mdb mdd mde mdi mdm mdo mdr mds mea meb med mee mei mem meo mer mes mi- mia mib mid mie mii mim mio mir mis mma mmb mmd mme mmi mmm mmo mmr mms moa mob mod moe moi mom moo mor mos mra mrb mrd mre mri mrm mro mrr mrs msa msb msd mse msi msm mso msr mss o-i oaa oab oad oae oai oam oao oar oas ob- oba obb obd obe obi obm obo obr obs oda odb odd ode odi odm odo odr ods oea oeb oed oee oei oem oeo oer oes oia oib oid oie oii oim oio oir ois om- oma omb omd ome omi omm omo omr oms oo- ooa oob ood ooi oom ooo oor oos or- ora orb ord ore ori orm oro orr ors os- osa osb osd ose osi osm oso osr oss ra- raa rab rad rae rai ram rao rar ras rba rbb rbd rbe rbi rbm rbo rbr rbs rda rdb rdd rde rdi rdm rdo rdr rds re- rea reb red ree rei rem reo rer res ria rib rid rie rii rim rio rir ris rma rmb rmd rme rmi rmm rmo rmr rms roa rob rod roe roi rom roo ror ros rra rrb rrd rri rrm rrr rrs rsa rsb rsd rse rsi rsm rso rsr rss saa sab sad sae sai sam sao sar sas sba sbb sbd sbe sbi sbm sbo sbr sbs sda sdb sdd sde sdi sdm sdo sdr sds se- sea seb sed see sei sem seo ser ses sia sib sid sie sii sim sio sir sis sma smb smd sme smi smm smo smr sms soa sob sod soe soi som soo sor sos sr- sra srb srd sre sri srm sro srr srs ss- ssa ssb ssd sse ssi ssm sso ssr sss