-al a-a a-b aaa aab aae aag aak aal ab- aba abb abe abg abk abl aea aeb aee aeg aek ael ag- aga agb age agg agk agl aka akb ake akg akk akl al- ala alb ale alg alk all baa bab bae bag bak bal bba bbb bbe bbg bbk bbl be- bea beb bee beg bek bel bga bgb bge bgg bgk bgl bka bkb bke bkg bkk bkl bla blb ble blg blk bll eaa eab eae eag eak eal eba ebb ebe ebg ebk ebl eea eeb eee eeg eek eel ega egb ege egg egl eka ekb eke ekg ekl ela elb ele elg elk ell gaa gab gae gag gak gal gba gbe gbg gbk gbl ge- gea geb gee geg gek gel gga ggb ggg gka gkb gla glb gle glg glk gll ka- kaa kab kae kag kak kal kba kbb kbe kbk kbl ke- kea keb kee keg kek kel kga kgb kgl kkb kke kkk kkl kl- kla klb klg la- laa lab lae lag lak lal lba lbb lbe lbg lbk lbl lea leb lee leg lek lel lga lgb lge lgg lgk lgl lka lkb lkg lkl lla llb lle llg llk lll