-al -ic a-a a-b a-c a-i aaa aab aac aai aak aal ab- aba abb abc abi abk abl ac- aca acb acc aci ack acl ai- aia aib aic aii aik ail aka akb akc aki akk akl al- ala alb alc ali alk all baa bab bac bai bak bal bba bbb bbc bbi bbk bbl bca bcb bcc bci bck bcl bi- bia bib bic bii bik bil bka bkb bkc bkk bkl bla blb blc bli blk bll c-- caa cab cac cai cak cal cba cbb cbc cbi cbk cbl cca ccb ccc cci cck ccl ci- cia cib cic cii cik cil cka ckb ckc cki cl- cla clb clc cli clk cll ia- iaa iab iac iai ial iba ibb ibc ibi ibk ibl ica icb icc ici ick icl iia iib iic iii iil ika ikb ikc iki ikk ikl il- ila ilb ilc ili ilk ill ka- kaa kab kac kai kak kal kba kbb kbc kbi kbk kbl kca kcb kcc kci kck kcl kia kib kic kii kik kil kkb kkc kki kkk kkl kl- kla klb klc kli la- laa lab lac lai lak lal lba lbb lbc lbi lbk lbl lca lcb lcc lci lck lcl lia lib lic lii lik lil lka lkb lkl lla llb llc lli llk lll