-er a-a a-b a-i aaa aab aad aae aai aak aam aao aar ab- aba abb abd abe abi abk abm abo abr ad- ada adb add ade adi adk adm ado adr aea aeb aed aee aei aek aem aeo aer ai- aia aib aid aie aii aik aim aio air aka akb akd ake aki akk akm ako akr ama amb amd ame ami amk amm amo amr aoa aob aod aoe aoi aok aom aoo aor ar- ara arb ard are ari ark arm aro arr baa bab bad bae bai bak bam bao bar bba bbb bbd bbe bbi bbk bbm bbo bbr bda bdb bdd bde bdi bdk bdm bdo bdr be- bea beb bed bee bei bek bem beo ber bi- bia bib bid bie bii bik bim bio bir bka bkb bke bkk bkm bko bkr bma bmb bmd bme bmi bmk bmm bmo bmr boa bob bod boe boi bok bom boo bor bra brb brd bre bri brk brm bro brr daa dab dad dae dai dak dam dao dar dba dbb dbd dbe dbi dbk dbm dbo dbr dda ddb ddd dde ddi ddk ddm ddo ddr de- dea deb ded dee dei dek dem deo der di- dia dib did die dii dik dim dio dir dka dkb dke dki dkk dkm dko dkr dma dmb dmd dme dmi dmk dmm dmo dmr doa dob dod doe doi dok dom doo dor dra drb drd dre dri drk drm dro drr eaa eab ead eae eai eak eam eao ear eba ebb ebd ebe ebi ebk ebm ebo ebr ed- eda edb edd ede edi edk edm edo edr eea eeb eed eee eek eem eeo eer eia eib eid eie eii eik eim eio eir eka ekb ekd eke eki eko ekr em- ema emb emd eme emi emk emm emo emr eo- eoa eob eod eoe eoi eok eom eoo eor era erb erd ere eri erk erm ero err i-d ia- iaa iab iad iae iai iam iao iar iba ibb ibd ibe ibi ibk ibm ibo ibr ida idb idd ide idi idk idm ido idr ie- iea ied iee iei iek iem ier iia iib iid iie iii iim iio iir ika ikb ike iki ikk iko ikr im- ima imb imd ime imi imm imo io- ioa iob iod ioe ioi iom ioo ior ir- ira irb ird ire iri irk irm iro irr ka- kaa kab kad kae kai kak kam kao kar kba kbb kbd kbe kbi kbk kbm kbo kbr kda kdb kde kdk kdm kdo kdr ke- kea keb ked kee kei kek kem keo ker kia kib kid kie kii kik kim kio kir kkb kke kki kkk kkm kkr kma kmb kmd kme kmi kmk kmm kmo koa kob kod koe koi kok kom koo kor kra krd kri krk kro krr m-o m-r maa mab mad mae mai mak mam mao mar mba mbb mbd mbe mbi mbk mbm mbo mbr mda mdb mdd mde mdi mdk mdm mdo mdr mea meb med mee mei mek mem meo mer mi- mia mib mid mie mii mik mim mio mir mka mkb mkd mke mkk mkm mko mkr mma mmb mmd mme mmi mmk mmm mmo mmr moa mob mod moe moi mok mom moo mor mra mrb mrd mre mri mrk mrm mro mrr o-i oaa oab oad oae oai oak oam oao oar ob- oba obb obd obe obi obk obm obo obr oda odb odd ode odi odm odo odr oea oeb oed oee oei oem oeo oer oia oib oid oie oii oik oim oio oir oka okb okd oke oki okk oko okr om- oma omb omd ome omi omm omo omr oo- ooa oob ood ooi ook oom ooo oor or- ora orb ord ore ori ork orm oro orr ra- raa rab rad rae rai rak ram rao rar rba rbb rbd rbe rbi rbk rbm rbo rbr rda rdb rdd rde rdi rdm rdo rdr re- rea reb red ree rei rek rem reo rer ria rib rid rie rii rik rim rio rir rkb rke rkk rkm rko rma rmb rmd rme rmi rmm rmo rmr roa rob rod roe roi rok rom roo ror rra rrb rrd rri rrk rrm rrr