a-a a-b a-t aaa aab aag aao aap aar aat aay ab- aba abb abg abo abp abr abt aby ag- aga agb agg ago agp agr agt agy aoa aob aog aoo aop aor aot ap- apa apb apg apo app apr apt apy ar- ara arb arg aro arp arr art ary at- ata atb atg ato atp atr att ay- aya ayo ayp ayr ayt b-p baa bab bag bao bap bar bat bay bba bbb bbg bbo bbp bbr bbt bby bga bgb bgg bgo bgp bgr bgt boa bob bog boo bop bor bot boy bpa bpb bpg bpo bpp bpr bpt bpy bra brb brg bro brp brr brt bry bta btb btg bto btp btr btt bty by- bya byg byo byp byr byt g-p gaa gab gag gao gap gar gat gay gba gbg gbo gbp gbr gbt gby gga ggb ggg ggo ggp ggr ggt goa gob gog goo gop gor got goy gpa gpb gpg gpo gpp gpr gpt gra grb grg gro grp grr grt gry gta gtb gtg gto gtp gtr gtt gty gy- gya gyb gyo gyp gyr oaa oab oag oao oap oar oat ob- oba obb obg obo obp obr obt oby oga ogg ogo ogp ogt ogy oo- ooa oob oog ooo oop oor oot op- opa opb opg opo opp opr opt opy or- ora orb org oro orp orr ort ory ot- ota otb otg oto otp otr ott oya oyo p-p paa pab pag pao pap par pat pay pba pbb pbg pbo pbp pbr pbt pby pga pgb pgg pgo pgp pgr pgt pgy poa pob pog poo pop por pot poy ppa ppb ppg ppo ppp ppr ppt pra prb prg pro prp prr prt pry pt- pta ptb ptg pto ptp ptr ptt pty py- pya pyb pyg pyo pyr pyt ra- raa rab rag rao rap rar rat ray rba rbb rbg rbo rbp rbr rbt rga rgb rgg rgo rgp rgr rgt roa rob rog roo rop ror rot roy rpa rpb rpg rpo rpp rpr rpt rra rrb rrg rrp rrr rrt rta rtb rtg rto rtp rtr rtt rty ry- rya ryg ryo ryr ryy taa tab tag tao tap tar tat tay tba tbb tbg tbo tbp tbr tbt tga tgb tgg tgo tgp tgr tgt tgy to- toa tob tog too top tor tot toy tpa tpb tpg tpo tpp tpr tpt tra trb trg tro trp trr trt try tta ttb ttg tto ttp ttr ttt tty tya tyg tyo typ tyr tyt yaa yab yag yao yap yar yat yay ybg ybp ybr yby yga ygo yob yog yoo yop yor yot yoy ypa ypg ypo yra yrg yro yrp yrt yta yto ytp ytr ytt yyb yyg yyt yyy