a-a a-b aaa aab aad aaf aan aao aau aay ab- aba abb abd abf abn abo abu aby ad- ada adb add adf adn ado adu ady af- afa afb afd aff afn afo afu afy an- ana anb and anf ann ano anu any aoa aob aod aof aon aoo aou au- aua aub aud auf aun auo ay- aya ayd ayf ayn ayo ayu b-u baa bab bad baf ban bao bau bay bba bbb bbd bbf bbn bbo bbu bby bda bdb bdd bdf bdo bdu bdy bfa bfb bfd bff bfn bfo bfu bfy bna bnb bnd bnf bnn bno bnu boa bob bod bof bon boo bou boy bua bub bud buf bun buo buu buy by- bya byd byf byn byo byu daa dab dad daf dan dao dau day dba dbb dbd dbf dbn dbo dbu dby dda ddb ddd ddf ddn ddo ddu ddy dfa dfb dfd dff dfn dfo dfu dna dnb dnd dnf dnn dno dny doa dob dod dof don doo dou doy dua dub dud duf dun duo duy dy- dya dyb dyd dyn dyo dyu dyy faa fab fad faf fan fao fau fay fba fbb fbd fbf fbn fbo fbu fda fdb fdd fdf fdn fdo fdu ffa ffd fff ffn ffo ffu ffy fna fnb fnd fnf fnn fnu foa fob fof fon foo fou foy fua fub fud fuf fun fuo fuu fy- fya fyb fyn fyo naa nab nad naf nan nao nau nay nba nbb nbd nbf nbn nbo nbu nda ndb ndd ndf ndn ndo ndu ndy nfa nfb nfd nff nfn nfo nfu nna nnb nnf nnn nno nnu no- noa nob nod nof non noo nou noy nua nub nud nun nuo nuu nuy nya nyd nyf nyn nyo nyu nyy oaa oab oad oaf oan oao oau ob- oba obb obd obf obn obo obu oby oda odb odd odf odn odo odu of- ofa ofb ofd off ofn ofo ofu on- ona onb ond onf onn ono onu ony oo- ooa oob ood oof oon ooo ou- oua oud ouf oun ouo oya oyd oyo ua- uaa uab uad uaf uan uao uau uay uba ubb ubf ubn ubo ubu uby uda udb udd udf udn udo udu ufa ufd uff ufn ufo ufu un- una unb und unf unn uno unu uny uoa uob uod uon uoo uua uun uuu uyo uyu yaa yab yad yaf yan yao yau yay ybf yby yda ydn ydo ydy yfa yfd yff yfu yna ynd ynn ynu yny yob yod yof yon yoo you yoy yua yud yun yuo yuu yuy yyb yyf yyu yyy