-al -er a-a a-b aaa aab aae aak aal aan aar aau ab- aba abb abe abk abl abn abr abu aea aeb aee aek ael aen aer aeu aka akb ake akk akl akn akr aku al- ala alb ale alk all aln alr alu an- ana anb ane ank anl ann anr anu ar- ara arb are ark arl arn arr aru au- aua aub aue auk aul aun aur b-u baa bab bae bak bal ban bar bau bba bbb bbe bbk bbl bbn bbr bbu be- bea beb bee bek bel ben ber beu bka bkb bke bkk bkl bkn bkr bla blb ble blk bll bln blr blu bna bnb bne bnk bnl bnn bnr bnu bra brb bre brk brl brn brr bru bua bub bue buk bul bun bur buu eaa eab eae eak eal ean ear eau eba ebb ebe ebk ebl ebn ebr ebu eea eeb eee eek eel een eer eka ekb eke ekl ekr eku ela elb ele elk ell eln elr elu en- ena enb ene enk enl enn enr enu era erb ere erk erl ern err eru eu- eua eub eue eul eun eur ka- kaa kab kae kak kal kan kar kau kba kbb kbe kbk kbl kbn kbr kbu ke- kea keb kee kek kel ken ker kkb kke kkk kkl kkn kkr kku kl- kla klb klr klu kn- kna kne knk knl knn knr knu kra krk krl krn krr kru kub kue kuk kul kun kur kuu la- laa lab lae lak lal lan lar lau lba lbb lbe lbk lbl lbr lbu lea leb lee lek lel len ler leu lka lkb lkl lkr lla llb lle llk lll lln llr llu lna lnb lne lnk lnl lnn lnr lnu lra lrb lrk lrn lrr lru lua lub lue luk lul lun lur luu naa nab nae nak nal nan nar nau nba nbb nbe nbk nbl nbn nbr nbu ne- nea neb nee nek nel nen ner neu nka nke nkk nkn nkr nku nla nlb nle nlk nll nln nlr nlu nna nnb nne nnk nnl nnn nnu nra nrb nre nrk nrl nrn nrr nru nua nub nue nuk nul nun nur nuu ra- raa rab rae rak ral ran rar rau rba rbb rbe rbk rbl rbn rbr rbu re- rea reb ree rek rel ren rer reu rkb rke rkk rku rla rle rll rln rlr rlu rna rnb rnn rnr rnu rra rrb rrk rrl rrn rrr rru rua rub rue ruk run rur ruu ua- uaa uab uae uak ual uan uar uau uba ubb ube ubk ubl ubn ubr ubu uea ueb uee uel uen uer uka ukb uke ukk ukl ukn ukr uku ula ulb ule ulk ull uln ulr ulu un- una unb une unk unl unn unr unu ur- ura urb ure urk url urn urr uru uua uue uun uur uuu