a-a a-b aaa aab aad aao aap aar aas aay ab- aba abb abd abo abp abr abs aby ad- ada adb add ado adp adr ads ady aoa aob aod aoo aop aor aos ap- apa apb apd apo app apr aps apy ar- ara arb ard aro arp arr ars ary as- asa asb asd aso asp asr ass asy ay- aya ayd ayo ayp ayr ays b-p baa bab bad bao bap bar bas bay bba bbb bbd bbo bbp bbr bbs bby bda bdb bdd bdo bdp bdr bds bdy boa bob bod boo bop bor bos boy bpa bpb bpd bpo bpp bpr bps bpy bra brb brd bro brp brr brs bry bsa bsb bsd bso bsp bsr bss bsy by- bya byd byo byp byr bys daa dab dad dao dap dar das day dba dbb dbd dbo dbp dbr dbs dby dda ddb ddd ddo ddp ddr dds ddy doa dob dod doo dop dor dos doy dpa dpb dpd dpo dpp dpr dps dra drb drd dro drp drr drs dry dsa dsb dsd dso dsp dsr dss dsy dy- dya dyb dyd dyo dyp dyr dys dyy oaa oab oad oao oap oar oas ob- oba obb obd obo obp obr obs oby oda odb odd odo odp odr ods oo- ooa oob ood ooo oop oor oos op- opa opb opd opo opp opr ops opy or- ora orb ord oro orp orr ors ory os- osa osb osd oso osp osr oss oya oyd oyo oys p-p paa pab pad pao pap par pas pay pba pbb pbd pbo pbp pbr pbs pby pda pdb pdd pdo pdp pdr pds poa pob pod poo pop por pos poy ppa ppb ppd ppo ppp ppr pps pra prb prd pro prp prr prs pry ps- psa psb psd pso psp psr pss psy py- pya pyb pyd pyo pyr pys ra- raa rab rad rao rap rar ras ray rba rbb rbd rbo rbp rbr rbs rda rdb rdd rdo rdp rdr rds rdy roa rob rod roo rop ror ros roy rpa rpb rpd rpo rpp rpr rps rra rrb rrd rrp rrr rrs rsa rsb rsd rso rsp rsr rss ry- rya ryd ryo ryr rys ryy saa sab sad sao sap sar sas say sba sbb sbd sbo sbp sbr sbs sby sda sdb sdd sdo sdp sdr sds sdy soa sob sod soo sop sor sos soy spa spb spd spo spp spr sps spy sr- sra srb srd sro srp srr srs sry ss- ssa ssb ssd sso ssp ssr sss sy- sya syb syd syp syr sys yaa yab yad yao yap yar yas yay ybp ybr ybs yby yda ydo yds ydy yob yod yoo yop yor yos yoy ypa ypd ypo yps yra yro yrp yrs ysa ysb yso ysp ysr yss ysy yyb yys yyy