a-a a-b aaa aab aad aam aan aar aau ab- aba abb abd abm abn abr abu ad- ada adb add adm adn adr adu ama amb amd amm amn amr amu an- ana anb and anm ann anr anu ar- ara arb ard arm arn arr aru au- aua aub aud aum aun aur b-u baa bab bad bam ban bar bau bba bbb bbd bbm bbn bbr bbu bda bdb bdd bdm bdr bdu bma bmb bmd bmm bmn bmr bmu bna bnb bnd bnn bnr bnu bra brb brd brm brn brr bru bua bub bud bum bun bur buu daa dab dad dam dan dar dau dba dbb dbd dbm dbn dbr dbu dda ddb ddd ddm ddn ddr ddu dma dmb dmd dmm dmn dmr dmu dna dnb dnd dnm dnn dnr dra drb drd drm drn drr dru dua dub dud dum dun dur m-r maa mab mad mam man mar mau mba mbb mbd mbm mbr mbu mda mdb mdd mdm mdn mdr mdu mma mmb mmd mmm mmn mmr mmu mna mnb mnm mnn mnr mnu mra mrb mrd mrm mrn mrr mru mua mub mud mum mun mur muu naa nab nad nam nan nar nau nba nbb nbd nbm nbn nbr nbu nda ndb ndd ndm ndn ndr ndu nma nmb nmd nmm nmn nmr nmu nna nnb nnm nnn nnu nra nrb nrd nrm nrn nrr nru nua nub nud num nun nur nuu ra- raa rab rad ram ran rar rau rba rbb rbd rbm rbn rbr rbu rda rdb rdd rdm rdn rdr rdu rma rmb rmd rmm rmn rmr rna rnb rnd rnm rnn rnr rnu rra rrb rrd rrm rrn rrr rru rua rub rud rum run rur ruu ua- uaa uab uad uam uan uar uau uba ubb ubn ubr ubu uda udb udd udm udn udr udu um- uma umb umd umm umn umr umu un- una unb und unm unn unr unu ur- ura urb urd urm urn urr uru uua uum uun uur uuu