-al -er a-a a-b a-c aaa aab aac aae aak aal aan aar aau ab- aba abb abc abe abk abl abn abr abu ac- aca acb acc ace ack acl acn acr acu aea aeb aec aee aek ael aen aer aeu aka akb akc ake akk akl akn akr aku al- ala alb alc ale alk all aln alr alu an- ana anb anc ane ank anl ann anr anu ar- ara arb arc are ark arl arn arr aru au- aua aub auc aue auk aul aun aur b-u baa bab bac bae bak bal ban bar bau bba bbb bbc bbe bbk bbl bbn bbr bbu bca bcb bcc bce bck bcl bcn bcr bcu be- bea beb bec bee bek bel ben ber beu bka bkb bkc bke bkk bkl bkn bkr bla blb blc ble blk bll bln blr blu bna bnb bnc bne bnk bnl bnn bnr bnu bra brb bre brk brl brn brr bru bua bub buc bue buk bul bun bur buu c-- caa cab cac cae cak cal can car cau cba cbb cbc cbe cbk cbl cbn cbr cbu cca ccb ccc cce cck ccl ccn ccr ccu ce- cea ceb cec cee cek cel cen cer ceu cka ckb ckc cl- cla clb clc cle clk cll cln clr clu cn- cna cnb cnc cne cnl cnn cnr cnu cra crb crc cre crk crl crn crr cru cua cub cuc cue cuk cul cun cur cuu eaa eab eac eae eak eal ean ear eau eba ebb ebc ebe ebk ebl ebn ebr ebu ec- eca ecb ecc ece eck ecl ecn ecr ecu eea eeb eec eee eek eel een eer eka ekb ekc eke ekl ekr eku ela elb elc ele elk ell eln elr elu en- ena enb enc ene enk enl enn enr enu era erb erc ere erk erl ern err eru eu- eua eub euc eue eul eun eur ka- kaa kab kac kae kak kal kan kar kau kba kbb kbc kbe kbk kbl kbn kbr kbu kca kcb kcc kce kck kcl kcn kcr kcu ke- kea keb kec kee kek kel ken ker kkb kkc kke kkk kkl kkn kkr kku kl- kla klb klc klr klu kn- kna knc kne knk knl knn knr knu kra krc krk krl krn krr kru kub kuc kue kuk kul kun kur kuu la- laa lab lac lae lak lal lan lar lau lba lbb lbc lbe lbk lbl lbr lbu lca lcb lcc lce lck lcl lcn lcr lcu lea leb lec lee lek lel len ler leu lka lkb lkl lkr lla llb llc lle llk lll lln llr llu lna lnb lnc lne lnk lnl lnn lnr lnu lra lrb lrc lrk lrn lrr lru lua lub luc lue luk lul lun lur luu naa nab nac nae nak nal nan nar nau nba nbb nbc nbe nbk nbl nbn nbr nbu nca ncb ncc nce nck ncl ncn ncr ncu ne- nea neb nec nee nek nel nen ner neu nka nkc nke nkk nkn nkr nku nla nlb nlc nle nlk nll nln nlr nlu nna nnb nnc nne nnk nnl nnn nnu nra nrb nrc nre nrk nrl nrn nrr nru nua nub nuc nue nuk nul nun nur nuu ra- raa rab rac rae rak ral ran rar rau rba rbb rbc rbe rbk rbl rbn rbr rbu rca rcb rcc rce rcl rcn rcr rcu re- rea reb rec ree rek rel ren rer reu rkb rkc rke rkk rku rla rlc rle rll rln rlr rlu rna rnb rnc rnn rnr rnu rra rrb rrc rrk rrl rrn rrr rru rua rub ruc rue ruk run rur ruu ua- uaa uab uac uae uak ual uan uar uau uba ubb ubc ube ubk ubl ubn ubr ubu uca ucb ucc uce uck ucl ucn ucr ucu uea ueb uec uee uel uen uer uka ukb ukc uke ukk ukl ukn ukr uku ula ulb ulc ule ulk ull uln ulr ulu un- una unb unc une unk unl unn unr unu ur- ura urb urc ure urk url urn urr uru uua uuc uue uun uur uuu