-al a-a a-b aaa aab aad aae aag aal ab- aba abb abd abe abg abl ad- ada adb add ade adg adl aea aeb aed aee aeg ael ag- aga agb agd age agg agl al- ala alb ald ale alg all baa bab bad bae bag bal bba bbb bbd bbe bbg bbl bda bdb bdd bde bdg bdl be- bea beb bed bee beg bel bga bgb bgd bge bgg bgl bla blb bld ble blg bll daa dab dad dae dag dal dba dbb dbd dbe dbg dbl dda ddb ddd dde ddg ddl de- dea deb ded dee deg del dga dgd dge dgg dgl dl- dla dlb dld dle dlg dll eaa eab ead eae eag eal eba ebb ebd ebe ebg ebl ed- eda edb edd ede edg edl eea eeb eed eee eeg eel ega egb egd ege egg egl ela elb eld ele elg ell g-d gaa gab gad gae gag gal gba gbd gbe gbg gbl gda gdb gdd gde gdl ge- gea geb ged gee geg gel gga ggb ggd ggg gla glb gld gle glg gll la- laa lab lad lae lag lal lba lbb lbd lbe lbg lbl lda ldb ldd lde ldg ldl lea leb led lee leg lel lga lgb lgd lge lgg lgl lla llb lld lle llg lll