a-a a-b a-i aaa aab aad aai aao aar aas aay ab- aba abb abd abi abo abr abs aby ad- ada adb add adi ado adr ads ady ai- aia aib aid aii aio air ais aiy aoa aob aod aoi aoo aor aos ar- ara arb ard ari aro arr ars ary as- asa asb asd asi aso asr ass asy ay- aya ayd ayi ayo ayr ays baa bab bad bai bao bar bas bay bba bbb bbd bbi bbo bbr bbs bby bda bdb bdd bdi bdo bdr bds bdy bi- bia bib bid bii bio bir bis biy boa bob bod boi boo bor bos boy bra brb brd bri bro brr brs bry bsa bsb bsd bsi bso bsr bss bsy by- bya byd byi byo byr bys daa dab dad dai dao dar das day dba dbb dbd dbi dbo dbr dbs dby dda ddb ddd ddi ddo ddr dds ddy di- dia dib did dii dio dir dis diy doa dob dod doi doo dor dos doy dra drb drd dri dro drr drs dry dsa dsb dsd dsi dso dsr dss dsy dy- dya dyb dyd dyo dyr dys dyy i-d ia- iaa iab iad iai iao iar ias iba ibb ibd ibi ibo ibr ibs iby ida idb idd idi ido idr ids idy iia iib iid iii iio iir iis io- ioa iob iod ioi ioo ior ios ir- ira irb ird iri iro irr irs iry is- isa isb isd isi iso isr iss isy iya iyo iyr iys iyy o-i oaa oab oad oai oao oar oas ob- oba obb obd obi obo obr obs oby oda odb odd odi odo odr ods oia oib oid oii oio oir ois oo- ooa oob ood ooi ooo oor oos or- ora orb ord ori oro orr ors ory os- osa osb osd osi oso osr oss oya oyd oyi oyo oys ra- raa rab rad rai rao rar ras ray rba rbb rbd rbi rbo rbr rbs rda rdb rdd rdi rdo rdr rds rdy ria rib rid rii rio rir ris riy roa rob rod roi roo ror ros roy rra rrb rrd rri rrr rrs rsa rsb rsd rsi rso rsr rss ry- rya ryd ryo ryr rys ryy saa sab sad sai sao sar sas say sba sbb sbd sbi sbo sbr sbs sby sda sdb sdd sdi sdo sdr sds sdy sia sib sid sii sio sir sis soa sob sod soi soo sor sos soy sr- sra srb srd sri sro srr srs sry ss- ssa ssb ssd ssi sso ssr sss sy- sya syb syd syi syr sys yaa yab yad yai yao yar yas yay ybi ybr ybs yby yda ydo yds ydy yid yii yio yir yis yob yod yoi yoo yor yos yoy yra yro yrs ysa ysb ysi yso ysr yss ysy yyb yys yyy