-ic a-a a-b a-c a-i aaa aab aac aaf aag aai aan aao aau ab- aba abb abc abf abg abi abn abo abu ac- aca acb acc acf acg aci acn aco acu af- afa afb afc aff afg afi afn afo afu ag- aga agb agc agf agg agi agn ago agu ai- aia aib aic aif aig aii ain aio aiu an- ana anb anc anf ang ani ann ano anu aoa aob aoc aof aog aoi aon aoo aou au- aua aub auc auf aug aui aun auo b-u baa bab bac baf bag bai ban bao bau bba bbb bbc bbf bbg bbi bbn bbo bbu bca bcb bcc bcf bcg bci bcn bco bcu bfa bfb bfc bff bfg bfi bfn bfo bfu bga bgb bgc bgf bgg bgi bgn bgo bgu bi- bia bib bic bif big bii bin bio biu bna bnb bnc bnf bng bni bnn bno bnu boa bob boc bof bog boi bon boo bou bua bub buc buf bug bui bun buo buu c-- caa cab cac caf cag cai can cao cau cba cbb cbc cbf cbg cbi cbn cbo cbu cca ccb ccc ccf ccg cci ccn cco ccu cfa cfb cfc cff cfg cfi cfn cfo cfu cga cgb cgc cgg cgi cgn cgo cgu ci- cia cib cic cif cig cii cin cio ciu cn- cna cnb cnc cnf cng cni cnn cno cnu co- coa cob coc cof cog coi con coo cou cua cub cuc cuf cug cui cun cuo cuu faa fab fac faf fag fai fan fao fau fba fbb fbc fbf fbg fbi fbn fbo fbu fca fcb fcc fcf fcg fci fcn fco fcu ffa ffc fff ffg ffi ffn ffo ffu fga fgb fgc fgf fgg fgi fgn fia fib fic fif fig fii fin fiu fna fnb fnc fnf fng fni fnn fnu foa fob foc fof fog foi fon foo fou fua fub fuf fug fui fun fuo fuu gaa gab gac gaf gag gai gan gao gau gba gbc gbf gbg gbi gbn gbo gbu gca gcb gcc gcf gcg gci gcn gco gcu gfa gfb gfc gff gfi gfo gga ggb ggc ggg ggi ggn ggo ggu gia gib gic gif gig gii gin gio giu gna gnb gnc gnf gni gnn gno gnu goa gob goc gof gog goi gon goo gou gu- gua gub guc guf gug gui gun guo guu i-f ia- iaa iab iac iaf iag iai ian iao iau iba ibb ibc ibf ibg ibi ibn ibo ibu ica icb icc icf icg ici icn ico icu ifa ifb ifc iff ifg ifi ifn ifo ifu iga igb igc igf igg igi ign igo igu iia iib iic iif iii iin iio iiu in- ina inb inc inf ing ini inn ino inu io- ioa iob ioc iof iog ioi ion ioo iou iu- iua iub iuc iug iui n-i naa nab nac naf nag nai nan nao nau nba nbb nbc nbf nbg nbi nbn nbo nbu nca ncb ncc ncf ncg nci ncn nco ncu nfa nfb nfc nff nfi nfn nfo nfu nga ngb ngc ngf ngg ngi ngn ngo ngu nia nib nic nif nig nii nin nio niu nna nnb nnc nnf nng nni nnn nno nnu no- noa nob noc nof nog noi non noo nou nua nub nuc nug nui nun nuo nuu o-i oaa oab oac oaf oag oai oan oao oau ob- oba obb obc obf obg obi obn obo obu oc- oca ocb occ ocf ocg oci ocn oco ocu of- ofa ofb ofc off ofg ofi ofn ofo ofu oga ogc ogf ogg ogi ogn ogo oia oib oic oif oii oin oio oiu on- ona onb onc onf ong oni onn ono onu oo- ooa oob ooc oof oog ooi oon ooo ou- oua ouc ouf oui oun ouo ua- uaa uab uac uaf uag uai uan uao uau uba ubb ubc ubf ubg ubi ubn ubo ubu uca ucb ucc ucf ucg uci ucn uco ucu ufa ufc uff ufg ufi ufn ufo ufu uga ugb ugc ugf ugg ugi ugn ugo ugu uia uib uic uif uig uii uin uio uiu un- una unb unc unf ung uni unn uno unu uoa uob uoc uog uon uoo uua uuc uug uun uuu