-al a-a a-b a-c aaa aab aac aae aag aal aan aau ab- aba abb abc abe abg abl abn abu ac- aca acb acc ace acg acl acn acu aea aeb aec aee aeg ael aen aeu ag- aga agb agc age agg agl agn agu al- ala alb alc ale alg all aln alu an- ana anb anc ane ang anl ann anu au- aua aub auc aue aug aul aun b-u baa bab bac bae bag bal ban bau bba bbb bbc bbe bbg bbl bbn bbu bca bcb bcc bce bcg bcl bcn bcu be- bea beb bec bee beg bel ben beu bga bgb bgc bge bgg bgl bgn bgu bla blb blc ble blg bll bln blu bna bnb bnc bne bng bnl bnn bnu bua bub buc bue bug bul bun buu c-- caa cab cac cae cag cal can cau cba cbb cbc cbe cbg cbl cbn cbu cca ccb ccc cce ccg ccl ccn ccu ce- cea ceb cec cee ceg cel cen ceu cga cgb cgc cge cgg cgl cgn cgu cl- cla clb clc cle clg cll cln clu cn- cna cnb cnc cne cng cnl cnn cnu cua cub cuc cue cug cul cun cuu eaa eab eac eae eag eal ean eau eba ebb ebc ebe ebg ebl ebn ebu ec- eca ecb ecc ece ecg ecl ecn ecu eea eeb eec eee eeg eel een ega egb egc ege egg egl egn egu ela elb elc ele elg ell eln elu en- ena enb enc ene eng enl enn enu eu- eua eub euc eue eug eul eun gaa gab gac gae gag gal gan gau gba gbc gbe gbg gbl gbn gbu gca gcb gcc gce gcg gcl gcn gcu ge- gea geb gec gee geg gel gen geu gga ggb ggc ggg ggn ggu gla glb glc gle glg gll gln glu gna gnb gnc gne gnl gnn gnu gu- gua gub guc gue gug gul gun guu la- laa lab lac lae lag lal lan lau lba lbb lbc lbe lbg lbl lbu lca lcb lcc lce lcg lcl lcn lcu lea leb lec lee leg lel len leu lga lgb lgc lge lgg lgl lgn lgu lla llb llc lle llg lll lln llu lna lnb lnc lne lng lnl lnn lnu lua lub luc lue lug lul lun luu naa nab nac nae nag nal nan nau nba nbb nbc nbe nbg nbl nbn nbu nca ncb ncc nce ncg ncl ncn ncu ne- nea neb nec nee neg nel nen neu nga ngb ngc nge ngg ngl ngn ngu nla nlb nlc nle nlg nll nln nlu nna nnb nnc nne nng nnl nnn nnu nua nub nuc nue nug nul nun nuu ua- uaa uab uac uae uag ual uan uau uba ubb ubc ube ubg ubl ubn ubu uca ucb ucc uce ucg ucl ucn ucu uea ueb uec uee ueg uel uen uga ugb ugc uge ugg ugl ugn ugu ula ulb ulc ule ulg ull uln ulu un- una unb unc une ung unl unn unu uua uuc uue uug uun uuu