-ic a-a a-b a-c a-i aaa aab aac aaf aag aai aan aao ab- aba abb abc abf abg abi abn abo ac- aca acb acc acf acg aci acn aco af- afa afb afc aff afg afi afn afo ag- aga agb agc agf agg agi agn ago ai- aia aib aic aif aig aii ain aio an- ana anb anc anf ang ani ann ano aoa aob aoc aof aog aoi aon aoo baa bab bac baf bag bai ban bao bba bbb bbc bbf bbg bbi bbn bbo bca bcb bcc bcf bcg bci bcn bco bfa bfb bfc bff bfg bfi bfn bfo bga bgb bgc bgf bgg bgi bgn bgo bi- bia bib bic bif big bii bin bio bna bnb bnc bnf bng bni bnn bno boa bob boc bof bog boi bon boo c-- caa cab cac caf cag cai can cao cba cbb cbc cbf cbg cbi cbn cbo cca ccb ccc ccf ccg cci ccn cco cfa cfb cfc cff cfg cfi cfn cfo cga cgb cgc cgg cgi cgn cgo ci- cia cib cic cif cig cii cin cio cn- cna cnb cnc cnf cng cni cnn cno co- coa cob coc cof cog coi con coo faa fab fac faf fag fai fan fao fba fbb fbc fbf fbg fbi fbn fbo fca fcb fcc fcf fcg fci fcn fco ffa ffc fff ffg ffi ffn ffo fga fgb fgc fgf fgg fgi fgn fia fib fic fif fig fii fin fna fnb fnc fnf fng fni fnn foa fob foc fof fog foi fon foo gaa gab gac gaf gag gai gan gao gba gbc gbf gbg gbi gbn gbo gca gcb gcc gcf gcg gci gcn gco gfa gfb gfc gff gfi gfo gga ggb ggc ggg ggi ggn ggo gia gib gic gif gig gii gin gio gna gnb gnc gnf gni gnn gno goa gob goc gof gog goi gon goo i-f ia- iaa iab iac iaf iag iai ian iao iba ibb ibc ibf ibg ibi ibn ibo ica icb icc icf icg ici icn ico ifa ifb ifc iff ifg ifi ifn ifo iga igb igc igf igg igi ign igo iia iib iic iif iii iin iio in- ina inb inc inf ing ini inn ino io- ioa iob ioc iof iog ioi ion ioo n-i naa nab nac naf nag nai nan nao nba nbb nbc nbf nbg nbi nbn nbo nca ncb ncc ncf ncg nci ncn nco nfa nfb nfc nff nfi nfn nfo nga ngb ngc ngf ngg ngi ngn ngo nia nib nic nif nig nii nin nio nna nnb nnc nnf nng nni nnn nno no- noa nob noc nof nog noi non noo o-i oaa oab oac oaf oag oai oan oao ob- oba obb obc obf obg obi obn obo oc- oca ocb occ ocf ocg oci ocn oco of- ofa ofb ofc off ofg ofi ofn ofo oga ogc ogf ogg ogi ogn ogo oia oib oic oif oii oin oio on- ona onb onc onf ong oni onn ono oo- ooa oob ooc oof oog ooi oon ooo