a-a a-b a-c aaa aab aac aad aan aao aar aau aay ab- aba abb abc abd abn abo abr abu aby ac- aca acb acc acd acn aco acr acu acy ad- ada adb adc add adn ado adr adu ady an- ana anb anc and ann ano anr anu any aoa aob aoc aod aon aoo aor aou ar- ara arb arc ard arn aro arr aru ary au- aua aub auc aud aun auo aur ay- aya ayc ayd ayn ayo ayr ayu b-u baa bab bac bad ban bao bar bau bay bba bbb bbc bbd bbn bbo bbr bbu bby bca bcb bcc bcd bcn bco bcr bcu bcy bda bdb bdc bdd bdo bdr bdu bdy bna bnb bnc bnd bnn bno bnr bnu boa bob boc bod bon boo bor bou boy bra brb brd brn bro brr bru bry bua bub buc bud bun buo bur buu buy by- bya byc byd byn byo byr byu c-- caa cab cac cad can cao car cau cay cba cbb cbc cbd cbn cbo cbr cbu cby cca ccb ccc ccd ccn cco ccr ccu cda cdb cdc cdd cdn cdo cdr cdu cdy cn- cna cnb cnc cnd cnn cno cnr cnu cny co- coa cob coc cod con coo cor cou coy cra crb crc crd crn cro crr cru cry cua cub cuc cud cun cuo cur cuu cuy cya cyb cyc cyd cyn cyo cyr daa dab dac dad dan dao dar dau day dba dbb dbc dbd dbn dbo dbr dbu dby dca dcb dcc dcd dcn dco dcr dcu dda ddb ddc ddd ddn ddo ddr ddu ddy dna dnb dnc dnd dnn dno dnr dny doa dob doc dod don doo dor dou doy dra drb drc drd drn dro drr dru dry dua dub duc dud dun duo dur duy dy- dya dyb dyc dyd dyn dyo dyr dyu dyy naa nab nac nad nan nao nar nau nay nba nbb nbc nbd nbn nbo nbr nbu nca ncb ncc ncd ncn nco ncr ncu nda ndb ndc ndd ndn ndo ndr ndu ndy nna nnb nnc nnn nno nnu no- noa nob noc nod non noo nor nou noy nra nrb nrc nrd nrn nro nrr nru nry nua nub nuc nud nun nuo nur nuu nuy nya nyc nyd nyn nyo nyu nyy oaa oab oac oad oan oao oar oau ob- oba obb obc obd obn obo obr obu oby oc- oca ocb occ ocd ocn oco ocr ocu oda odb odc odd odn odo odr odu on- ona onb onc ond onn ono onr onu ony oo- ooa oob ooc ood oon ooo oor or- ora orb orc ord orn oro orr oru ory ou- oua ouc oud oun ouo our oya oyd oyo ra- raa rab rac rad ran rao rar rau ray rba rbb rbc rbd rbn rbo rbr rbu rca rcb rcc rcd rcn rco rcr rcu rda rdb rdc rdd rdn rdo rdr rdu rdy rna rnb rnc rnd rnn rno rnr rnu rny roa rob roc rod ron roo ror rou roy rra rrb rrc rrd rrn rrr rru rua rub ruc rud run ruo rur ruu ruy ry- rya ryc ryd ryn ryo ryr ryu ryy ua- uaa uab uac uad uan uao uar uau uay uba ubb ubc ubn ubo ubr ubu uby uca ucb ucc ucd ucn uco ucr ucu uda udb udc udd udn udo udr udu un- una unb unc und unn uno unr unu uny uoa uob uoc uod uon uoo uor ur- ura urb urc urd urn uro urr uru ury uua uuc uun uur uuu uyc uyo uyu yaa yab yac yad yan yao yar yau yay ybc ybr yby yca ycc ycd yco ycu ycy yda ydn ydo ydy yna ynd ynn ynu yny yob yoc yod yon yoo yor you yoy yra yrc yrn yro yru yua yud yun yuo yur yuu yuy yyb yyc yyu yyy