a-a a-b a-t aaa aab aan aap aar aat aay ab- aba abb abn abp abr abt aby an- ana anb ann anp anr ant any ap- apa apb apn app apr apt apy ar- ara arb arn arp arr art ary at- ata atb atn atp atr att ay- aya ayn ayp ayr ayt b-p baa bab ban bap bar bat bay bba bbb bbn bbp bbr bbt bby bna bnb bnn bnp bnr bnt bpa bpb bpn bpp bpr bpt bpy bra brb brn brp brr brt bry bta btb btn btp btr btt bty by- bya byn byp byr byt naa nab nan nap nar nat nay nba nbb nbn nbp nbr nbt nna nnb nnn nnp nnt npa npb npn npp npr npt nra nrb nrn nrp nrr nrt nry nta ntb ntn ntp ntr ntt nya nyn nyp nyt nyy p-p paa pab pan pap par pat pay pba pbb pbn pbp pbr pbt pby pn- pna pnb pnn pnp pnr pnt pny ppa ppb ppn ppp ppr ppt pra prb prn prp prr prt pry pt- pta ptb ptn ptp ptr ptt pty py- pya pyb pyn pyr pyt ra- raa rab ran rap rar rat ray rba rbb rbn rbp rbr rbt rna rnb rnn rnp rnr rnt rny rpa rpb rpn rpp rpr rpt rra rrb rrn rrp rrr rrt rta rtb rtn rtp rtr rtt rty ry- rya ryn ryr ryy taa tab tan tap tar tat tay tba tbb tbn tbp tbr tbt tna tnb tnn tnp tnr tnt tpa tpb tpn tpp tpr tpt tra trb trn trp trr trt try tta ttb ttn ttp ttr ttt tty tya tyn typ tyr tyt yaa yab yan yap yar yat yay ybp ybr yby yna ynn ynp yny ypa yra yrn yrp yrt yta ytn ytp ytr ytt yyb yyt yyy