-ic a-a a-b a-c a-i aaa aab aac aad aaf aai aan ab- aba abb abc abd abf abi abn ac- aca acb acc acd acf aci acn ad- ada adb adc add adf adi adn af- afa afb afc afd aff afi afn ai- aia aib aic aid aif aii ain an- ana anb anc and anf ani ann baa bab bac bad baf bai ban bba bbb bbc bbd bbf bbi bbn bca bcb bcc bcd bcf bci bcn bda bdb bdc bdd bdf bdi bfa bfb bfc bfd bff bfi bfn bi- bia bib bic bid bif bii bin bna bnb bnc bnd bnf bni bnn c-- caa cab cac cad caf cai can cba cbb cbc cbd cbf cbi cbn cca ccb ccc ccd ccf cci ccn cda cdb cdc cdd cdf cdi cdn cfa cfb cfc cfd cff cfi cfn ci- cia cib cic cid cif cii cin cn- cna cnb cnc cnd cnf cni cnn daa dab dac dad daf dai dan dba dbb dbc dbd dbf dbi dbn dca dcb dcc dcd dcf dci dcn dda ddb ddc ddd ddf ddi ddn dfa dfb dfc dfd dff dfi dfn di- dia dib dic did dif dii din dna dnb dnc dnd dnf dni dnn faa fab fac fad faf fai fan fba fbb fbc fbd fbf fbi fbn fca fcb fcc fcd fcf fci fcn fda fdb fdc fdd fdf fdi fdn ffa ffc ffd fff ffi ffn fia fib fic fid fif fii fin fna fnb fnc fnd fnf fni fnn i-d i-f ia- iaa iab iac iad iaf iai ian iba ibb ibc ibd ibf ibi ibn ica icb icc icd icf ici icn ida idb idc idd idf idi idn ifa ifb ifc ifd iff ifi ifn iia iib iic iid iif iii iin in- ina inb inc ind inf ini inn n-i naa nab nac nad naf nai nan nba nbb nbc nbd nbf nbi nbn nca ncb ncc ncd ncf nci ncn nda ndb ndc ndd ndf ndi ndn nfa nfb nfc nfd nff nfi nfn nia nib nic nid nif nii nin nna nnb nnc nnf nni nnn