-al -ic a-a a-b a-c a-i aaa aab aac aaf aai aal ab- aba abb abc abf abi abl ac- aca acb acc acf aci acl af- afa afb afc aff afi afl ai- aia aib aic aif aii ail al- ala alb alc alf ali all baa bab bac baf bai bal bba bbb bbc bbf bbi bbl bca bcb bcc bcf bci bcl bfa bfb bfc bff bfi bfl bi- bia bib bic bif bii bil bla blb blc blf bli bll c-- caa cab cac caf cai cal cba cbb cbc cbf cbi cbl cca ccb ccc ccf cci ccl cfa cfb cfc cff cfi cfl ci- cia cib cic cif cii cil cl- cla clb clc clf cli cll faa fab fac faf fai fal fba fbb fbc fbf fbi fbl fca fcb fcc fcf fci fcl ffa ffc fff ffi ffl fia fib fic fif fii fil fla flb flc flf fli fll i-f ia- iaa iab iac iaf iai ial iba ibb ibc ibf ibi ibl ica icb icc icf ici icl ifa ifb ifc iff ifi ifl iia iib iic iif iii iil il- ila ilb ilc ilf ili ill la- laa lab lac laf lai lal lba lbb lbc lbf lbi lbl lca lcb lcc lcf lci lcl lfa lfb lfc lff lfi lfl lia lib lic lif lii lil lla llb llc llf lli lll