-al -ic a-a a-b a-c a-i aaa aab aac aaf aai aak aal ab- aba abb abc abf abi abk abl ac- aca acb acc acf aci ack acl af- afa afb afc aff afi afk afl ai- aia aib aic aif aii aik ail aka akb akc aki akk akl al- ala alb alc alf ali alk all baa bab bac baf bai bak bal bba bbb bbc bbf bbi bbk bbl bca bcb bcc bcf bci bck bcl bfa bfb bfc bff bfi bfl bi- bia bib bic bif bii bik bil bka bkb bkc bkf bkk bkl bla blb blc blf bli blk bll c-- caa cab cac caf cai cak cal cba cbb cbc cbf cbi cbk cbl cca ccb ccc ccf cci cck ccl cfa cfb cfc cff cfi cfk cfl ci- cia cib cic cif cii cik cil cka ckb ckc cki cl- cla clb clc clf cli clk cll faa fab fac faf fai fak fal fba fbb fbc fbf fbi fbk fbl fca fcb fcc fcf fci fck fcl ffa ffc fff ffi ffk ffl fia fib fic fif fii fik fil fka fkb fkc fkf fki fkk fkl fla flb flc flf fli fll i-f ia- iaa iab iac iaf iai ial iba ibb ibc ibf ibi ibk ibl ica icb icc icf ici ick icl ifa ifb ifc iff ifi ifl iia iib iic iif iii iil ika ikb ikc ikf iki ikk ikl il- ila ilb ilc ilf ili ilk ill ka- kaa kab kac kaf kai kak kal kba kbb kbc kbf kbi kbk kbl kca kcb kcc kci kck kcl kfa kfc kff kfi kia kib kic kif kii kik kil kkb kkc kki kkk kkl kl- kla klb klc klf kli la- laa lab lac laf lai lak lal lba lbb lbc lbf lbi lbk lbl lca lcb lcc lcf lci lck lcl lfa lfb lfc lff lfi lfk lfl lia lib lic lif lii lik lil lka lkb lkl lla llb llc llf lli llk lll