a-a a-b aaa aab aad aan aao aau aay ab- aba abb abd abn abo abu aby ad- ada adb add adn ado adu ady an- ana anb and ann ano anu any aoa aob aod aon aoo aou au- aua aub aud aun auo ay- aya ayd ayn ayo ayu b-u baa bab bad ban bao bau bay bba bbb bbd bbn bbo bbu bby bda bdb bdd bdo bdu bdy bna bnb bnd bnn bno bnu boa bob bod bon boo bou boy bua bub bud bun buo buu buy by- bya byd byn byo byu daa dab dad dan dao dau day dba dbb dbd dbn dbo dbu dby dda ddb ddd ddn ddo ddu ddy dna dnb dnd dnn dno dny doa dob dod don doo dou doy dua dub dud dun duo duy dy- dya dyb dyd dyn dyo dyu dyy naa nab nad nan nao nau nay nba nbb nbd nbn nbo nbu nda ndb ndd ndn ndo ndu ndy nna nnb nnn nno nnu no- noa nob nod non noo nou noy nua nub nud nun nuo nuu nuy nya nyd nyn nyo nyu nyy oaa oab oad oan oao oau ob- oba obb obd obn obo obu oby oda odb odd odn odo odu on- ona onb ond onn ono onu ony oo- ooa oob ood oon ooo ou- oua oud oun ouo oya oyd oyo ua- uaa uab uad uan uao uau uay uba ubb ubn ubo ubu uby uda udb udd udn udo udu un- una unb und unn uno unu uny uoa uob uod uon uoo uua uun uuu uyo uyu yaa yab yad yan yao yau yay yby yda ydn ydo ydy yna ynd ynn ynu yny yob yod yon yoo you yoy yua yud yun yuo yuu yuy yyb yyu yyy