-al -ic a-a a-b a-c a-i aaa aab aac aaf aai aak aal aan ab- aba abb abc abf abi abk abl abn ac- aca acb acc acf aci ack acl acn af- afa afb afc aff afi afk afl afn ai- aia aib aic aif aii aik ail ain aka akb akc aki akk akl akn al- ala alb alc alf ali alk all aln an- ana anb anc anf ani ank anl ann baa bab bac baf bai bak bal ban bba bbb bbc bbf bbi bbk bbl bbn bca bcb bcc bcf bci bck bcl bcn bfa bfb bfc bff bfi bfl bfn bi- bia bib bic bif bii bik bil bin bka bkb bkc bkf bkk bkl bkn bla blb blc blf bli blk bll bln bna bnb bnc bnf bni bnk bnl bnn c-- caa cab cac caf cai cak cal can cba cbb cbc cbf cbi cbk cbl cbn cca ccb ccc ccf cci cck ccl ccn cfa cfb cfc cff cfi cfk cfl cfn ci- cia cib cic cif cii cik cil cin cka ckb ckc cki cl- cla clb clc clf cli clk cll cln cn- cna cnb cnc cnf cni cnl cnn faa fab fac faf fai fak fal fan fba fbb fbc fbf fbi fbk fbl fbn fca fcb fcc fcf fci fck fcl fcn ffa ffc fff ffi ffk ffl ffn fia fib fic fif fii fik fil fin fka fkb fkc fkf fki fkk fkl fla flb flc flf fli fll fln fna fnb fnc fnf fni fnk fnl fnn i-f ia- iaa iab iac iaf iai ial ian iba ibb ibc ibf ibi ibk ibl ibn ica icb icc icf ici ick icl icn ifa ifb ifc iff ifi ifl ifn iia iib iic iif iii iil iin ika ikb ikc ikf iki ikk ikl il- ila ilb ilc ilf ili ilk ill iln in- ina inb inc inf ini ink inl inn ka- kaa kab kac kaf kai kak kal kan kba kbb kbc kbf kbi kbk kbl kbn kca kcb kcc kci kck kcl kcn kfa kfc kff kfi kia kib kic kif kii kik kil kin kkb kkc kki kkk kkl kkn kl- kla klb klc klf kli kn- kna knc knf kni knk knl knn la- laa lab lac laf lai lak lal lan lba lbb lbc lbf lbi lbk lbl lca lcb lcc lcf lci lck lcl lcn lfa lfb lfc lff lfi lfk lfl lfn lia lib lic lif lii lik lil lin lka lkb lkl lla llb llc llf lli llk lll lln lna lnb lnc lni lnk lnl lnn n-i naa nab nac naf nai nak nal nan nba nbb nbc nbf nbi nbk nbl nbn nca ncb ncc ncf nci nck ncl ncn nfa nfb nfc nff nfi nfk nfl nfn nia nib nic nif nii nik nil nin nka nkc nkf nki nkk nkn nla nlb nlc nlf nli nlk nll nln nna nnb nnc nnf nni nnk nnl nnn