-al a-a a-b a-c aaa aab aac aae aag aah aal ab- aba abb abc abe abg abh abl ac- aca acb acc ace acg ach acl aea aeb aec aee aeg aeh ael ag- aga agb agc age agg agh agl aha ahb ahc ahe ahg ahh ahl al- ala alb alc ale alg alh all baa bab bac bae bag bah bal bba bbb bbc bbe bbg bbh bbl bca bcb bcc bce bcg bch bcl be- bea beb bec bee beg beh bel bga bgb bgc bge bgg bgh bgl bha bhb bhc bhe bhg bhh bhl bla blb blc ble blg blh bll c-- caa cab cac cae cag cah cal cba cbb cbc cbe cbg cbh cbl cca ccb ccc cce ccg cch ccl ce- cea ceb cec cee ceg ceh cel cga cgb cgc cge cgg cgh cgl ch- cha chb chc che chg chh chl cl- cla clb clc cle clg clh cll eaa eab eac eae eag eah eal eba ebb ebc ebe ebg ebh ebl ec- eca ecb ecc ece ecg ech ecl eea eeb eec eee eeg eel ega egb egc ege egg egh egl eha ehb ehc ehe ehg ehh ehl ela elb elc ele elg elh ell gaa gab gac gae gag gah gal gba gbc gbe gbg gbh gbl gca gcb gcc gce gcg gch gcl ge- gea geb gec gee geg geh gel gga ggb ggc ggg ggh gha ghb ghc ghe ghg ghh ghl gla glb glc gle glg glh gll haa hab hac hae hag hah hal hba hbb hbc hbe hbg hbh hbl hca hcb hcc hce hcg hch hcl he- hea heb hec hee heg heh hel hga hgb hgc hge hgg hgh hgl hha hhb hhc hhe hhg hhh hhl hla hlb hlc hle hlg hlh hll la- laa lab lac lae lag lah lal lba lbb lbc lbe lbg lbh lbl lca lcb lcc lce lcg lch lcl lea leb lec lee leg leh lel lga lgb lgc lge lgg lgh lgl lha lhb lhc lhh lla llb llc lle llg lll