a-a a-b a-i aaa aab aad aai aao aap aar aay ab- aba abb abd abi abo abp abr aby ad- ada adb add adi ado adp adr ady ai- aia aib aid aii aio aip air aiy aoa aob aod aoi aoo aop aor ap- apa apb apd api apo app apr apy ar- ara arb ard ari aro arp arr ary ay- aya ayd ayi ayo ayp ayr b-p baa bab bad bai bao bap bar bay bba bbb bbd bbi bbo bbp bbr bby bda bdb bdd bdi bdo bdp bdr bdy bi- bia bib bid bii bio bip bir biy boa bob bod boi boo bop bor boy bpa bpb bpd bpi bpo bpp bpr bpy bra brb brd bri bro brp brr bry by- bya byd byi byo byp byr daa dab dad dai dao dap dar day dba dbb dbd dbi dbo dbp dbr dby dda ddb ddd ddi ddo ddp ddr ddy di- dia dib did dii dio dip dir diy doa dob dod doi doo dop dor doy dpa dpb dpd dpi dpo dpp dpr dra drb drd dri dro drp drr dry dy- dya dyb dyd dyo dyp dyr dyy i-d ia- iaa iab iad iai iao iap iar iba ibb ibd ibi ibo ibp ibr iby ida idb idd idi ido idp idr idy iia iib iid iii iio iip iir io- ioa iob iod ioi ioo iop ior ipa ipb ipd ipi ipo ipp ipr ipy ir- ira irb ird iri iro irp irr iry iya iyo iyr iyy o-i oaa oab oad oai oao oap oar ob- oba obb obd obi obo obp obr oby oda odb odd odi odo odp odr oia oib oid oii oio oip oir oo- ooa oob ood ooi ooo oop oor op- opa opb opd opi opo opp opr opy or- ora orb ord ori oro orp orr ory oya oyd oyi oyo p-p paa pab pad pai pao pap par pay pba pbb pbd pbi pbo pbp pbr pby pda pdb pdd pdi pdo pdp pdr pia pib pid pii pio pip pir poa pob pod poi poo pop por poy ppa ppb ppd ppi ppo ppp ppr pra prb prd pri pro prp prr pry py- pya pyb pyd pyo pyr ra- raa rab rad rai rao rap rar ray rba rbb rbd rbi rbo rbp rbr rda rdb rdd rdi rdo rdp rdr rdy ria rib rid rii rio rip rir riy roa rob rod roi roo rop ror roy rpa rpb rpd rpi rpo rpp rpr rra rrb rrd rri rrp rrr ry- rya ryd ryo ryr ryy yaa yab yad yai yao yap yar yay ybi ybp ybr yby yda ydo ydy yid yii yio yip yir yob yod yoi yoo yop yor yoy ypa ypd ypo yra yro yrp yyb yyy