-er a-a a-b aaa aab aad aae aak aam aan aar aau ab- aba abb abd abe abk abm abn abr abu ad- ada adb add ade adk adm adn adr adu aea aeb aed aee aek aem aen aer aeu aka akb akd ake akk akm akn akr aku ama amb amd ame amk amm amn amr amu an- ana anb and ane ank anm ann anr anu ar- ara arb ard are ark arm arn arr aru au- aua aub aud aue auk aum aun aur b-u baa bab bad bae bak bam ban bar bau bba bbb bbd bbe bbk bbm bbn bbr bbu bda bdb bdd bde bdk bdm bdr bdu be- bea beb bed bee bek bem ben ber beu bka bkb bke bkk bkm bkn bkr bma bmb bmd bme bmk bmm bmn bmr bmu bna bnb bnd bne bnk bnn bnr bnu bra brb brd bre brk brm brn brr bru bua bub bud bue buk bum bun bur buu daa dab dad dae dak dam dan dar dau dba dbb dbd dbe dbk dbm dbn dbr dbu dda ddb ddd dde ddk ddm ddn ddr ddu de- dea deb ded dee dek dem den der deu dka dkb dke dkk dkm dkr dku dma dmb dmd dme dmk dmm dmn dmr dmu dna dnb dnd dne dnk dnm dnn dnr dra drb drd dre drk drm drn drr dru dua dub dud due duk dum dun dur eaa eab ead eae eak eam ean ear eau eba ebb ebd ebe ebk ebm ebn ebr ebu ed- eda edb edd ede edk edm edn edr edu eea eeb eed eee eek eem een eer eka ekb ekd eke ekr eku em- ema emb emd eme emk emm emn emr emu en- ena enb end ene enk enm enn enr enu era erb erd ere erk erm ern err eru eu- eua eub eud eue eun eur ka- kaa kab kad kae kak kam kan kar kau kba kbb kbd kbe kbk kbm kbn kbr kbu kda kdb kde kdk kdm kdr kdu ke- kea keb ked kee kek kem ken ker kkb kke kkk kkm kkn kkr kku kma kmb kmd kme kmk kmm kmu kn- kna knd kne knk knm knn knr knu kra krd krk krn krr kru kub kud kue kuk kum kun kur kuu m-r maa mab mad mae mak mam man mar mau mba mbb mbd mbe mbk mbm mbr mbu mda mdb mdd mde mdk mdm mdn mdr mdu mea meb med mee mek mem men mer meu mka mkb mkd mke mkk mkm mkn mkr mku mma mmb mmd mme mmk mmm mmn mmr mmu mna mnb mne mnk mnm mnn mnr mnu mra mrb mrd mre mrk mrm mrn mrr mru mua mub mud mue muk mum mun mur muu naa nab nad nae nak nam nan nar nau nba nbb nbd nbe nbk nbm nbn nbr nbu nda ndb ndd nde ndk ndm ndn ndr ndu ne- nea neb ned nee nek nem nen ner neu nka nke nkk nkm nkn nkr nku nma nmb nmd nme nmk nmm nmn nmr nmu nna nnb nne nnk nnm nnn nnu nra nrb nrd nre nrk nrm nrn nrr nru nua nub nud nue nuk num nun nur nuu ra- raa rab rad rae rak ram ran rar rau rba rbb rbd rbe rbk rbm rbn rbr rbu rda rdb rdd rde rdm rdn rdr rdu re- rea reb red ree rek rem ren rer reu rkb rke rkk rkm rku rma rmb rmd rme rmm rmn rmr rna rnb rnd rnm rnn rnr rnu rra rrb rrd rrk rrm rrn rrr rru rua rub rud rue ruk rum run rur ruu ua- uaa uab uad uae uak uam uan uar uau uba ubb ube ubk ubn ubr ubu uda udb udd ude udk udm udn udr udu uea ueb ued uee uem uen uer uka ukb uke ukk ukn ukr uku um- uma umb umd ume umm umn umr umu un- una unb und une unk unm unn unr unu ur- ura urb urd ure urk urm urn urr uru uua uue uum uun uur uuu