-er a-a a-b aaa aab aad aae aam aan aao aar aau ab- aba abb abd abe abm abn abo abr abu ad- ada adb add ade adm adn ado adr adu aea aeb aed aee aem aen aeo aer aeu ama amb amd ame amm amn amo amr amu an- ana anb and ane anm ann ano anr anu aoa aob aod aoe aom aon aoo aor aou ar- ara arb ard are arm arn aro arr aru au- aua aub aud aue aum aun auo aur b-u baa bab bad bae bam ban bao bar bau bba bbb bbd bbe bbm bbn bbo bbr bbu bda bdb bdd bde bdm bdo bdr bdu be- bea beb bed bee bem ben beo ber beu bma bmb bmd bme bmm bmn bmo bmr bmu bna bnb bnd bne bnn bno bnr bnu boa bob bod boe bom bon boo bor bou bra brb brd bre brm brn bro brr bru bua bub bud bue bum bun buo bur buu daa dab dad dae dam dan dao dar dau dba dbb dbd dbe dbm dbn dbo dbr dbu dda ddb ddd dde ddm ddn ddo ddr ddu de- dea deb ded dee dem den deo der deu dma dmb dmd dme dmm dmn dmo dmr dmu dna dnb dnd dne dnm dnn dno dnr doa dob dod doe dom don doo dor dou dra drb drd dre drm drn dro drr dru dua dub dud due dum dun duo dur eaa eab ead eae eam ean eao ear eau eba ebb ebd ebe ebm ebn ebo ebr ebu ed- eda edb edd ede edm edn edo edr edu eea eeb eed eee eem een eeo eer em- ema emb emd eme emm emn emo emr emu en- ena enb end ene enm enn eno enr enu eo- eoa eob eod eoe eom eon eoo eor eou era erb erd ere erm ern ero err eru eu- eua eub eud eue eun eur m-o m-r maa mab mad mae mam man mao mar mau mba mbb mbd mbe mbm mbo mbr mbu mda mdb mdd mde mdm mdn mdo mdr mdu mea meb med mee mem men meo mer meu mma mmb mmd mme mmm mmn mmo mmr mmu mna mnb mne mnm mnn mno mnr mnu moa mob mod moe mom mon moo mor mou mra mrb mrd mre mrm mrn mro mrr mru mua mub mud mue mum mun mur muu naa nab nad nae nam nan nao nar nau nba nbb nbd nbe nbm nbn nbo nbr nbu nda ndb ndd nde ndm ndn ndo ndr ndu ne- nea neb ned nee nem nen neo ner neu nma nmb nmd nme nmm nmn nmo nmr nmu nna nnb nne nnm nnn nno nnu no- noa nob nod noe nom non noo nor nou nra nrb nrd nre nrm nrn nro nrr nru nua nub nud nue num nun nuo nur nuu oaa oab oad oae oam oan oao oar oau ob- oba obb obd obe obm obn obo obr obu oda odb odd ode odm odn odo odr odu oea oeb oed oee oem oen oeo oer om- oma omb omd ome omm omn omo omr omu on- ona onb ond one onn ono onr onu oo- ooa oob ood oom oon ooo oor or- ora orb ord ore orm orn oro orr oru ou- oua oud oue oum oun ouo our ra- raa rab rad rae ram ran rao rar rau rba rbb rbd rbe rbm rbn rbo rbr rbu rda rdb rdd rde rdm rdn rdo rdr rdu re- rea reb red ree rem ren reo rer reu rma rmb rmd rme rmm rmn rmo rmr rna rnb rnd rnm rnn rno rnr rnu roa rob rod roe rom ron roo ror rou rra rrb rrd rrm rrn rrr rru rua rub rud rue rum run ruo rur ruu ua- uaa uab uad uae uam uan uao uar uau uba ubb ube ubn ubo ubr ubu uda udb udd ude udm udn udo udr udu uea ueb ued uee uem uen uer um- uma umb umd ume umm umn umo umr umu un- una unb und une unm unn uno unr unu uoa uob uod uoe uom uon uoo uor ur- ura urb urd ure urm urn uro urr uru uua uue uum uun uur uuu