-al a-a a-b a-c aaa aab aac aaf aaj aak aal ab- aba abb abc abf abj abk abl ac- aca acb acc acf acj ack acl af- afa afb afc aff afj afk afl aja ajb ajc ajf ajj ajk ajl aka akb akc akj akk akl al- ala alb alc alf alj alk all baa bab bac baf baj bak bal bba bbb bbc bbf bbk bbl bca bcb bcc bcf bcj bck bcl bfa bfb bfc bff bfj bfl bja bjc bjf bjj bjk bka bkb bkc bkf bkk bkl bla blb blc blf blj blk bll c-- c-j caa cab cac caf caj cak cal cba cbb cbc cbf cbj cbk cbl cca ccb ccc ccf ccj cck ccl cfa cfb cfc cff cfk cfl cja cjb cjc cjf cjk cka ckb ckc cl- cla clb clc clf clj clk cll faa fab fac faf faj fak fal fba fbb fbc fbf fbk fbl fca fcb fcc fcf fcj fck fcl ffa ffc fff ffk ffl fja fjb fjc fka fkb fkc fkf fkj fkk fkl fla flb flc flf fll jaa jab jac jaf jaj jak jal jba jbc jbf jbj jbk jbl jca jcb jcc jcf jck jcl jfa jfb jfc jff jfj jfk jfl jja jjb jjc jjf jjj jjk jjl jka jkb jkk jkl jla jlb jlc jlf jll ka- kaa kab kac kaf kaj kak kal kba kbb kbc kbf kbk kbl kca kcb kcc kck kcl kfa kfc kff kjb kjc kkb kkc kkk kkl kl- kla klb klc klf la- laa lab lac laf laj lak lal lba lbb lbc lbf lbj lbk lbl lca lcb lcc lcf lcj lck lcl lfa lfb lfc lff lfk lfl ljf ljj lka lkb lkl lla llb llc llf llj llk lll