a-a a-b a-t aaa aab aad aao aap aar aat aay ab- aba abb abd abo abp abr abt aby ad- ada adb add ado adp adr adt ady aoa aob aod aoo aop aor aot ap- apa apb apd apo app apr apt apy ar- ara arb ard aro arp arr art ary at- ata atb atd ato atp atr att ay- aya ayd ayo ayp ayr ayt b-p baa bab bad bao bap bar bat bay bba bbb bbd bbo bbp bbr bbt bby bda bdb bdd bdo bdp bdr bdt bdy boa bob bod boo bop bor bot boy bpa bpb bpd bpo bpp bpr bpt bpy bra brb brd bro brp brr brt bry bta btb btd bto btp btr btt bty by- bya byd byo byp byr byt daa dab dad dao dap dar dat day dba dbb dbd dbo dbp dbr dbt dby dda ddb ddd ddo ddp ddr ddt ddy doa dob dod doo dop dor dot doy dpa dpb dpd dpo dpp dpr dpt dra drb drd dro drp drr drt dry dta dtb dtd dto dtp dtr dtt dty dy- dya dyb dyd dyo dyp dyr dyy oaa oab oad oao oap oar oat ob- oba obb obd obo obp obr obt oby oda odb odd odo odp odr odt oo- ooa oob ood ooo oop oor oot op- opa opb opd opo opp opr opt opy or- ora orb ord oro orp orr ort ory ot- ota otb otd oto otp otr ott oya oyd oyo p-p paa pab pad pao pap par pat pay pba pbb pbd pbo pbp pbr pbt pby pda pdb pdd pdo pdp pdr pdt poa pob pod poo pop por pot poy ppa ppb ppd ppo ppp ppr ppt pra prb prd pro prp prr prt pry pt- pta ptb ptd pto ptp ptr ptt pty py- pya pyb pyd pyo pyr pyt ra- raa rab rad rao rap rar rat ray rba rbb rbd rbo rbp rbr rbt rda rdb rdd rdo rdp rdr rdt rdy roa rob rod roo rop ror rot roy rpa rpb rpd rpo rpp rpr rpt rra rrb rrd rrp rrr rrt rta rtb rtd rto rtp rtr rtt rty ry- rya ryd ryo ryr ryy taa tab tad tao tap tar tat tay tba tbb tbd tbo tbp tbr tbt tda tdb tdd tdo tdp tdr tdt tdy to- toa tob tod too top tor tot toy tpa tpb tpd tpo tpp tpr tpt tra trb trd tro trp trr trt try tta ttb ttd tto ttp ttr ttt tty tya tyd tyo typ tyr tyt yaa yab yad yao yap yar yat yay ybp ybr yby yda ydo ydt ydy yob yod yoo yop yor yot yoy ypa ypd ypo yra yro yrp yrt yta ytd yto ytp ytr ytt yyb yyt yyy