-al -er a-a a-b a-c a-t aaa aab aac aae aak aal aan aar aat aau ab- aba abb abc abe abk abl abn abr abt abu ac- aca acb acc ace ack acl acn acr act acu aea aeb aec aee aek ael aen aer aet aeu aka akb akc ake akk akl akn akr aku al- ala alb alc ale alk all aln alr alt alu an- ana anb anc ane ank anl ann anr ant anu ar- ara arb arc are ark arl arn arr art aru at- ata atb atc ate atl atn atr att atu au- aua aub auc aue auk aul aun aur aut b-u baa bab bac bae bak bal ban bar bat bau bba bbb bbc bbe bbk bbl bbn bbr bbt bbu bca bcb bcc bce bck bcl bcn bcr bct bcu be- bea beb bec bee bek bel ben ber bet beu bka bkb bkc bke bkk bkl bkn bkr bkt bla blb blc ble blk bll bln blr blt blu bna bnb bnc bne bnk bnl bnn bnr bnt bnu bra brb bre brk brl brn brr brt bru bta btb btc bte btk btl btn btr btt btu bua bub buc bue buk bul bun bur but buu c-- caa cab cac cae cak cal can car cat cau cba cbb cbc cbe cbk cbl cbn cbr cbt cbu cca ccb ccc cce cck ccl ccn ccr cct ccu ce- cea ceb cec cee cek cel cen cer cet ceu cka ckb ckc ckt cl- cla clb clc cle clk cll cln clr clt clu cn- cna cnb cnc cne cnl cnn cnr cnt cnu cra crb crc cre crk crl crn crr crt cru cta ctb ctc cte ctk ctl ctn ctr ctt ctu cua cub cuc cue cuk cul cun cur cut cuu eaa eab eac eae eak eal ean ear eat eau eba ebb ebc ebe ebk ebl ebn ebr ebt ebu ec- eca ecb ecc ece eck ecl ecn ecr ect ecu eea eeb eec eee eek eel een eer eet eka ekb ekc eke ekl ekr ekt eku ela elb elc ele elk ell eln elr elt elu en- ena enb enc ene enk enl enn enr ent enu era erb erc ere erk erl ern err ert eru eta etb etc ete etk etl etn etr ett etu eu- eua eub euc eue eul eun eur eut k-t ka- kaa kab kac kae kak kal kan kar kat kau kba kbb kbc kbe kbk kbl kbn kbr kbu kca kcb kcc kce kck kcl kcn kcr kct kcu ke- kea keb kec kee kek kel ken ker ket kkb kkc kke kkk kkl kkn kkr kkt kku kl- kla klb klc klr klt klu kn- kna knc kne knk knl knn knr knt knu kra krc krk krl krn krr krt kru kta ktb ktc kte ktk ktl ktn ktr ktt ktu kub kuc kue kuk kul kun kur kut kuu la- laa lab lac lae lak lal lan lar lat lau lba lbb lbc lbe lbk lbl lbr lbt lbu lca lcb lcc lce lck lcl lcn lcr lct lcu lea leb lec lee lek lel len ler let leu lka lkb lkl lkr lkt lla llb llc lle llk lll lln llr llt llu lna lnb lnc lne lnk lnl lnn lnr lnt lnu lra lrb lrc lrk lrn lrr lrt lru lta ltb ltc lte ltk ltl ltr ltt ltu lua lub luc lue luk lul lun lur lut luu naa nab nac nae nak nal nan nar nat nau nba nbb nbc nbe nbk nbl nbn nbr nbt nbu nca ncb ncc nce nck ncl ncn ncr nct ncu ne- nea neb nec nee nek nel nen ner net neu nka nkc nke nkk nkn nkr nkt nku nla nlb nlc nle nlk nll nln nlr nlt nlu nna nnb nnc nne nnk nnl nnn nnt nnu nra nrb nrc nre nrk nrl nrn nrr nrt nru nta ntb ntc nte ntk ntn ntr ntt ntu nua nub nuc nue nuk nul nun nur nut nuu ra- raa rab rac rae rak ral ran rar rat rau rba rbb rbc rbe rbk rbl rbn rbr rbt rbu rca rcb rcc rce rcl rcn rcr rct rcu re- rea reb rec ree rek rel ren rer ret reu rkb rkc rke rkk rkt rku rla rlc rle rll rln rlr rlt rlu rna rnb rnc rnn rnr rnt rnu rra rrb rrc rrk rrl rrn rrr rrt rru rta rtb rtc rte rtk rtl rtn rtr rtt rtu rua rub ruc rue ruk run rur rut ruu taa tab tac tae tak tal tan tar tat tau tba tbb tbc tbe tbk tbl tbn tbr tbt tbu tca tcb tcc tce tck tcl tcn tcr tct tcu te- tea teb tec tee tek tel ten ter tet teu tka tkb tkc tke tkk tkl tkr tkt tla tlc tle tlk tll tln tlr tlt tlu tna tnb tnc tne tnk tnl tnn tnr tnt tra trb trc tre trk trl trn trr trt tru tta ttb ttc tte ttk ttl ttn ttr ttt ttu tua tub tuc tue tuk tul tun tur tut tuu ua- uaa uab uac uae uak ual uan uar uat uau uba ubb ubc ube ubk ubl ubn ubr ubt ubu uca ucb ucc uce uck ucl ucn ucr uct ucu uea ueb uec uee uel uen uer uet uka ukb ukc uke ukk ukl ukn ukr uku ula ulb ulc ule ulk ull uln ulr ult ulu un- una unb unc une unk unl unn unr unt unu ur- ura urb urc ure urk url urn urr urt uru uta utb utc ute utk utl utn utr utt utu uua uuc uue uun uur uut uuu