a-a a-b a-t aaa aab aad aan aao aas aat aay ab- aba abb abd abn abo abs abt aby ad- ada adb add adn ado ads adt ady an- ana anb and ann ano ans ant any aoa aob aod aon aoo aos aot as- asa asb asd asn aso ass ast asy at- ata atb atd atn ato ats att ay- aya ayd ayn ayo ays ayt baa bab bad ban bao bas bat bay bba bbb bbd bbn bbo bbs bbt bby bda bdb bdd bdo bds bdt bdy bna bnb bnd bnn bno bns bnt boa bob bod bon boo bos bot boy bsa bsb bsd bsn bso bss bst bsy bta btb btd btn bto bts btt bty by- bya byd byn byo bys byt daa dab dad dan dao das dat day dba dbb dbd dbn dbo dbs dbt dby dda ddb ddd ddn ddo dds ddt ddy dna dnb dnd dnn dno dns dnt dny doa dob dod don doo dos dot doy dsa dsb dsd dsn dso dss dst dsy dta dtb dtd dtn dto dts dtt dty dy- dya dyb dyd dyn dyo dys dyy naa nab nad nan nao nas nat nay nba nbb nbd nbn nbo nbs nbt nda ndb ndd ndn ndo nds ndt ndy nna nnb nnn nno nns nnt no- noa nob nod non noo nos not noy nsa nsb nsd nsn nso nss nst nsy nta ntb ntd ntn nto nts ntt nya nyd nyn nyo nys nyt nyy oaa oab oad oan oao oas oat ob- oba obb obd obn obo obs obt oby oda odb odd odn odo ods odt on- ona onb ond onn ono ons ont ony oo- ooa oob ood oon ooo oos oot os- osa osb osd osn oso oss ost ot- ota otb otd otn oto ots ott oya oyd oyo oys saa sab sad san sao sas sat say sba sbb sbd sbn sbo sbs sbt sby sda sdb sdd sdn sdo sds sdt sdy sna snb snd snn sno sns snt sny soa sob sod son soo sos sot soy ss- ssa ssb ssd ssn sso sss sst sta stb std stn sto sts stt sty sy- sya syb syd syn sys syt taa tab tad tan tao tas tat tay tba tbb tbd tbn tbo tbs tbt tda tdb tdd tdn tdo tds tdt tdy tna tnb tnd tnn tno tns tnt to- toa tob tod ton too tos tot toy tsa tsb tsd tsn tso tss tst tsy tta ttb ttd ttn tto tts ttt tty tya tyd tyn tyo tys tyt yaa yab yad yan yao yas yat yay ybs yby yda ydn ydo yds ydt ydy yna ynd ynn yns yny yob yod yon yoo yos yot yoy ysa ysb yso yss yst ysy yta ytd ytn yto yts ytt yyb yys yyt yyy