a-a a-b a-i aaa aab aad aai aao aap aar aas aay ab- aba abb abd abi abo abp abr abs aby ad- ada adb add adi ado adp adr ads ady ai- aia aib aid aii aio aip air ais aiy aoa aob aod aoi aoo aop aor aos ap- apa apb apd api apo app apr aps apy ar- ara arb ard ari aro arp arr ars ary as- asa asb asd asi aso asp asr ass asy ay- aya ayd ayi ayo ayp ayr ays b-p baa bab bad bai bao bap bar bas bay bba bbb bbd bbi bbo bbp bbr bbs bby bda bdb bdd bdi bdo bdp bdr bds bdy bi- bia bib bid bii bio bip bir bis biy boa bob bod boi boo bop bor bos boy bpa bpb bpd bpi bpo bpp bpr bps bpy bra brb brd bri bro brp brr brs bry bsa bsb bsd bsi bso bsp bsr bss bsy by- bya byd byi byo byp byr bys daa dab dad dai dao dap dar das day dba dbb dbd dbi dbo dbp dbr dbs dby dda ddb ddd ddi ddo ddp ddr dds ddy di- dia dib did dii dio dip dir dis diy doa dob dod doi doo dop dor dos doy dpa dpb dpd dpi dpo dpp dpr dps dra drb drd dri dro drp drr drs dry dsa dsb dsd dsi dso dsp dsr dss dsy dy- dya dyb dyd dyo dyp dyr dys dyy i-d ia- iaa iab iad iai iao iap iar ias iba ibb ibd ibi ibo ibp ibr ibs iby ida idb idd idi ido idp idr ids idy iia iib iid iii iio iip iir iis io- ioa iob iod ioi ioo iop ior ios ipa ipb ipd ipi ipo ipp ipr ips ipy ir- ira irb ird iri iro irp irr irs iry is- isa isb isd isi iso isp isr iss isy iya iyo iyr iys iyy o-i oaa oab oad oai oao oap oar oas ob- oba obb obd obi obo obp obr obs oby oda odb odd odi odo odp odr ods oia oib oid oii oio oip oir ois oo- ooa oob ood ooi ooo oop oor oos op- opa opb opd opi opo opp opr ops opy or- ora orb ord ori oro orp orr ors ory os- osa osb osd osi oso osp osr oss oya oyd oyi oyo oys p-p paa pab pad pai pao pap par pas pay pba pbb pbd pbi pbo pbp pbr pbs pby pda pdb pdd pdi pdo pdp pdr pds pia pib pid pii pio pip pir pis poa pob pod poi poo pop por pos poy ppa ppb ppd ppi ppo ppp ppr pps pra prb prd pri pro prp prr prs pry ps- psa psb psd psi pso psp psr pss psy py- pya pyb pyd pyo pyr pys ra- raa rab rad rai rao rap rar ras ray rba rbb rbd rbi rbo rbp rbr rbs rda rdb rdd rdi rdo rdp rdr rds rdy ria rib rid rii rio rip rir ris riy roa rob rod roi roo rop ror ros roy rpa rpb rpd rpi rpo rpp rpr rps rra rrb rrd rri rrp rrr rrs rsa rsb rsd rsi rso rsp rsr rss ry- rya ryd ryo ryr rys ryy saa sab sad sai sao sap sar sas say sba sbb sbd sbi sbo sbp sbr sbs sby sda sdb sdd sdi sdo sdp sdr sds sdy sia sib sid sii sio sip sir sis soa sob sod soi soo sop sor sos soy spa spb spd spi spo spp spr sps spy sr- sra srb srd sri sro srp srr srs sry ss- ssa ssb ssd ssi sso ssp ssr sss sy- sya syb syd syi syp syr sys yaa yab yad yai yao yap yar yas yay ybi ybp ybr ybs yby yda ydo yds ydy yid yii yio yip yir yis yob yod yoi yoo yop yor yos yoy ypa ypd ypo yps yra yro yrp yrs ysa ysb ysi yso ysp ysr yss ysy yyb yys yyy