-al a-a a-b a-c aaa aab aac aae aag aal aau ab- aba abb abc abe abg abl abu ac- aca acb acc ace acg acl acu aea aeb aec aee aeg ael aeu ag- aga agb agc age agg agl agu al- ala alb alc ale alg all alu au- aua aub auc aue aug aul b-u baa bab bac bae bag bal bau bba bbb bbc bbe bbg bbl bbu bca bcb bcc bce bcg bcl bcu be- bea beb bec bee beg bel beu bga bgb bgc bge bgg bgl bgu bla blb blc ble blg bll blu bua bub buc bue bug bul buu c-- caa cab cac cae cag cal cau cba cbb cbc cbe cbg cbl cbu cca ccb ccc cce ccg ccl ccu ce- cea ceb cec cee ceg cel ceu cga cgb cgc cge cgg cgl cgu cl- cla clb clc cle clg cll clu cua cub cuc cue cug cul cuu eaa eab eac eae eag eal eau eba ebb ebc ebe ebg ebl ebu ec- eca ecb ecc ece ecg ecl ecu eea eeb eec eee eeg eel ega egb egc ege egg egl egu ela elb elc ele elg ell elu eu- eua eub euc eue eug eul gaa gab gac gae gag gal gau gba gbc gbe gbg gbl gbu gca gcb gcc gce gcg gcl gcu ge- gea geb gec gee geg gel geu gga ggb ggc ggg ggu gla glb glc gle glg gll glu gu- gua gub guc gue gug gul guu la- laa lab lac lae lag lal lau lba lbb lbc lbe lbg lbl lbu lca lcb lcc lce lcg lcl lcu lea leb lec lee leg lel leu lga lgb lgc lge lgg lgl lgu lla llb llc lle llg lll llu lua lub luc lue lug lul luu ua- uaa uab uac uae uag ual uau uba ubb ubc ube ubg ubl ubu uca ucb ucc uce ucg ucl ucu uea ueb uec uee ueg uel uga ugb ugc uge ugg ugl ugu ula ulb ulc ule ulg ull ulu uua uuc uue uug uuu