-er a-a a-b aaa aab aad aae aak aam aar aau ab- aba abb abd abe abk abm abr abu ad- ada adb add ade adk adm adr adu aea aeb aed aee aek aem aer aeu aka akb akd ake akk akm akr aku ama amb amd ame amk amm amr amu ar- ara arb ard are ark arm arr aru au- aua aub aud aue auk aum aur b-u baa bab bad bae bak bam bar bau bba bbb bbd bbe bbk bbm bbr bbu bda bdb bdd bde bdk bdm bdr bdu be- bea beb bed bee bek bem ber beu bka bkb bke bkk bkm bkr bma bmb bmd bme bmk bmm bmr bmu bra brb brd bre brk brm brr bru bua bub bud bue buk bum bur buu daa dab dad dae dak dam dar dau dba dbb dbd dbe dbk dbm dbr dbu dda ddb ddd dde ddk ddm ddr ddu de- dea deb ded dee dek dem der deu dka dkb dke dkk dkm dkr dku dma dmb dmd dme dmk dmm dmr dmu dra drb drd dre drk drm drr dru dua dub dud due duk dum dur eaa eab ead eae eak eam ear eau eba ebb ebd ebe ebk ebm ebr ebu ed- eda edb edd ede edk edm edr edu eea eeb eed eee eek eem eer eka ekb ekd eke ekr eku em- ema emb emd eme emk emm emr emu era erb erd ere erk erm err eru eu- eua eub eud eue eur ka- kaa kab kad kae kak kam kar kau kba kbb kbd kbe kbk kbm kbr kbu kda kdb kde kdk kdm kdr kdu ke- kea keb ked kee kek kem ker kkb kke kkk kkm kkr kku kma kmb kmd kme kmk kmm kmu kra krd krk krr kru kub kud kue kuk kum kur kuu m-r maa mab mad mae mak mam mar mau mba mbb mbd mbe mbk mbm mbr mbu mda mdb mdd mde mdk mdm mdr mdu mea meb med mee mek mem mer meu mka mkb mkd mke mkk mkm mkr mku mma mmb mmd mme mmk mmm mmr mmu mra mrb mrd mre mrk mrm mrr mru mua mub mud mue muk mum mur muu ra- raa rab rad rae rak ram rar rau rba rbb rbd rbe rbk rbm rbr rbu rda rdb rdd rde rdm rdr rdu re- rea reb red ree rek rem rer reu rkb rke rkk rkm rku rma rmb rmd rme rmm rmr rra rrb rrd rrk rrm rrr rru rua rub rud rue ruk rum rur ruu ua- uaa uab uad uae uak uam uar uau uba ubb ube ubk ubr ubu uda udb udd ude udk udm udr udu uea ueb ued uee uem uer uka ukb uke ukk ukr uku um- uma umb umd ume umm umr umu ur- ura urb urd ure urk urm urr uru uua uue uum uur uuu