a-a a-b a-z aaa aab aad aao aap aar aay aaz ab- aba abb abd abo abp abr aby abz ad- ada adb add ado adp adr ady adz aoa aob aod aoo aop aor ap- apa apb apd apo app apr apy ar- ara arb ard aro arp arr ary arz ay- aya ayd ayo ayp ayr ayz az- aza azb azd azo azp azy azz b-p baa bab bad bao bap bar bay baz bba bbb bbd bbo bbp bbr bby bda bdb bdd bdo bdp bdr bdy bdz boa bob bod boo bop bor boy boz bpa bpb bpd bpo bpp bpr bpy bra brb brd bro brp brr bry brz by- bya byd byo byp byr byz bza bzd bzo bzp bzr bzz daa dab dad dao dap dar day daz dba dbb dbd dbo dbp dbr dby dbz dda ddb ddd ddo ddp ddr ddy ddz doa dob dod doo dop dor doy doz dpa dpb dpd dpo dpp dpr dpz dra drb drd dro drp drr dry drz dy- dya dyb dyd dyo dyp dyr dyy dza dzb dzd dzo dzp dzr oaa oab oad oao oap oar ob- oba obb obd obo obp obr oby oda odb odd odo odp odr oo- ooa oob ood ooo oop oor op- opa opb opd opo opp opr opy or- ora orb ord oro orp orr ory orz oya oyd oyo oza ozo ozz p-p paa pab pad pao pap par pay paz pba pbb pbd pbo pbp pbr pby pbz pda pdb pdd pdo pdp pdr pdz poa pob pod poo pop por poy poz ppa ppb ppd ppo ppp ppr ppz pra prb prd pro prp prr pry prz py- pya pyb pyd pyo pyr pzp ra- raa rab rad rao rap rar ray raz rba rbb rbd rbo rbp rbr rda rdb rdd rdo rdp rdr rdy roa rob rod roo rop ror roy roz rpa rpb rpd rpo rpp rpr rpz rra rrb rrd rrp rrr ry- rya ryd ryo ryr ryy ryz rza rzb rzo rzy yaa yab yad yao yap yar yay yaz ybp ybr yby ybz yda ydo ydy yob yod yoo yop yor yoy ypa ypd ypo yra yro yrp yyb yyy yyz yzb yzr yzy zaa zab zad zao zap zar zay zaz zbb zbr zby zo- zoa zob zod zoo zor zpo zpp zpr zro zrp zzr zzy zzz