-al a-a a-b a-c a-t aaa aab aac aae aak aal aat aau ab- aba abb abc abe abk abl abt abu ac- aca acb acc ace ack acl act acu aea aeb aec aee aek ael aet aeu aka akb akc ake akk akl aku al- ala alb alc ale alk all alt alu at- ata atb atc ate atl att atu au- aua aub auc aue auk aul aut b-u baa bab bac bae bak bal bat bau bba bbb bbc bbe bbk bbl bbt bbu bca bcb bcc bce bck bcl bct bcu be- bea beb bec bee bek bel bet beu bka bkb bkc bke bkk bkl bkt bla blb blc ble blk bll blt blu bta btb btc bte btk btl btt btu bua bub buc bue buk bul but buu c-- caa cab cac cae cak cal cat cau cba cbb cbc cbe cbk cbl cbt cbu cca ccb ccc cce cck ccl cct ccu ce- cea ceb cec cee cek cel cet ceu cka ckb ckc ckt cl- cla clb clc cle clk cll clt clu cta ctb ctc cte ctk ctl ctt ctu cua cub cuc cue cuk cul cut cuu eaa eab eac eae eak eal eat eau eba ebb ebc ebe ebk ebl ebt ebu ec- eca ecb ecc ece eck ecl ect ecu eea eeb eec eee eek eel eet eka ekb ekc eke ekl ekt eku ela elb elc ele elk ell elt elu eta etb etc ete etk etl ett etu eu- eua eub euc eue eul eut k-t ka- kaa kab kac kae kak kal kat kau kba kbb kbc kbe kbk kbl kbu kca kcb kcc kce kck kcl kct kcu ke- kea keb kec kee kek kel ket kkb kkc kke kkk kkl kkt kku kl- kla klb klc klt klu kta ktb ktc kte ktk ktl ktt ktu kub kuc kue kuk kul kut kuu la- laa lab lac lae lak lal lat lau lba lbb lbc lbe lbk lbl lbt lbu lca lcb lcc lce lck lcl lct lcu lea leb lec lee lek lel let leu lka lkb lkl lkt lla llb llc lle llk lll llt llu lta ltb ltc lte ltk ltl ltt ltu lua lub luc lue luk lul lut luu taa tab tac tae tak tal tat tau tba tbb tbc tbe tbk tbl tbt tbu tca tcb tcc tce tck tcl tct tcu te- tea teb tec tee tek tel tet teu tka tkb tkc tke tkk tkl tkt tla tlc tle tlk tll tlt tlu tta ttb ttc tte ttk ttl ttt ttu tua tub tuc tue tuk tul tut tuu ua- uaa uab uac uae uak ual uat uau uba ubb ubc ube ubk ubl ubt ubu uca ucb ucc uce uck ucl uct ucu uea ueb uec uee uel uet uka ukb ukc uke ukk ukl uku ula ulb ulc ule ulk ull ult ulu uta utb utc ute utk utl utt utu uua uuc uue uut uuu