a-a a-b a-i a-t aaa aab aai aap aar aas aat aay ab- aba abb abi abp abr abs abt aby ai- aia aib aii aip air ais ait aiy ap- apa apb api app apr aps apt apy ar- ara arb ari arp arr ars art ary as- asa asb asi asp asr ass ast asy at- ata atb ati atp atr ats att ay- aya ayi ayp ayr ays ayt b-p baa bab bai bap bar bas bat bay bba bbb bbi bbp bbr bbs bbt bby bi- bia bib bii bip bir bis bit biy bpa bpb bpi bpp bpr bps bpt bpy bra brb bri brp brr brs brt bry bsa bsb bsi bsp bsr bss bst bsy bta btb bti btp btr bts btt bty by- bya byi byp byr bys byt ia- iaa iab iai iap iar ias iat iba ibb ibi ibp ibr ibs ibt iby iia iib iii iip iir iis iit ipa ipb ipi ipp ipr ips ipt ipy ir- ira irb iri irp irr irs irt iry is- isa isb isi isp isr iss ist isy ita itb iti itp its itt ity iya iyr iys iyt iyy p-p paa pab pai pap par pas pat pay pba pbb pbi pbp pbr pbs pbt pby pia pib pii pip pir pis pit ppa ppb ppi ppp ppr pps ppt pra prb pri prp prr prs prt pry ps- psa psb psi psp psr pss pst psy pt- pta ptb pti ptp ptr pts ptt pty py- pya pyb pyr pys pyt ra- raa rab rai rap rar ras rat ray rba rbb rbi rbp rbr rbs rbt ria rib rii rip rir ris rit riy rpa rpb rpi rpp rpr rps rpt rra rrb rri rrp rrr rrs rrt rsa rsb rsi rsp rsr rss rst rta rtb rti rtp rtr rts rtt rty ry- rya ryr rys ryy saa sab sai sap sar sas sat say sba sbb sbi sbp sbr sbs sbt sby sia sib sii sip sir sis sit spa spb spi spp spr sps spt spy sr- sra srb sri srp srr srs srt sry ss- ssa ssb ssi ssp ssr sss sst sta stb sti stp str sts stt sty sy- sya syb syi syp syr sys syt taa tab tai tap tar tas tat tay tba tbb tbi tbp tbr tbs tbt tia tib tii tip tir tis tit tiy tpa tpb tpi tpp tpr tps tpt tra trb tri trp trr trs trt try tsa tsb tsi tsp tsr tss tst tsy tta ttb tti ttp ttr tts ttt tty tya typ tyr tys tyt yaa yab yai yap yar yas yat yay ybi ybp ybr ybs yby yii yip yir yis yit ypa yps yra yrp yrs yrt ysa ysb ysi ysp ysr yss yst ysy yta ytp ytr yts ytt yyb yys yyt yyy