-al a-a a-b a-c aaa aab aac aad aae aag aal ab- aba abb abc abd abe abg abl ac- aca acb acc acd ace acg acl ad- ada adb adc add ade adg adl aea aeb aec aed aee aeg ael ag- aga agb agc agd age agg agl al- ala alb alc ald ale alg all baa bab bac bad bae bag bal bba bbb bbc bbd bbe bbg bbl bca bcb bcc bcd bce bcg bcl bda bdb bdc bdd bde bdg bdl be- bea beb bec bed bee beg bel bga bgb bgc bgd bge bgg bgl bla blb blc bld ble blg bll c-- caa cab cac cad cae cag cal cba cbb cbc cbd cbe cbg cbl cca ccb ccc ccd cce ccg ccl cda cdb cdc cdd cde cdg cdl ce- cea ceb cec ced cee ceg cel cga cgb cgc cgd cge cgg cgl cl- cla clb clc cld cle clg cll daa dab dac dad dae dag dal dba dbb dbc dbd dbe dbg dbl dca dcb dcc dcd dce dcg dcl dda ddb ddc ddd dde ddg ddl de- dea deb dec ded dee deg del dga dgc dgd dge dgg dgl dl- dla dlb dlc dld dle dlg dll eaa eab eac ead eae eag eal eba ebb ebc ebd ebe ebg ebl ec- eca ecb ecc ecd ece ecg ecl ed- eda edb edc edd ede edg edl eea eeb eec eed eee eeg eel ega egb egc egd ege egg egl ela elb elc eld ele elg ell g-d gaa gab gac gad gae gag gal gba gbc gbd gbe gbg gbl gca gcb gcc gcd gce gcg gcl gda gdb gdc gdd gde gdl ge- gea geb gec ged gee geg gel gga ggb ggc ggd ggg gla glb glc gld gle glg gll la- laa lab lac lad lae lag lal lba lbb lbc lbd lbe lbg lbl lca lcb lcc lcd lce lcg lcl lda ldb ldc ldd lde ldg ldl lea leb lec led lee leg lel lga lgb lgc lgd lge lgg lgl lla llb llc lld lle llg lll