a-a a-b a-i a-t aaa aab aad aai aap aar aas aat ab- aba abb abd abi abp abr abs abt ad- ada adb add adi adp adr ads adt ai- aia aib aid aii aip air ais ait ap- apa apb apd api app apr aps apt ar- ara arb ard ari arp arr ars art as- asa asb asd asi asp asr ass ast at- ata atb atd ati atp atr ats att b-p baa bab bad bai bap bar bas bat bba bbb bbd bbi bbp bbr bbs bbt bda bdb bdd bdi bdp bdr bds bdt bi- bia bib bid bii bip bir bis bit bpa bpb bpd bpi bpp bpr bps bpt bra brb brd bri brp brr brs brt bsa bsb bsd bsi bsp bsr bss bst bta btb btd bti btp btr bts btt daa dab dad dai dap dar das dat dba dbb dbd dbi dbp dbr dbs dbt dda ddb ddd ddi ddp ddr dds ddt di- dia dib did dii dip dir dis dit dpa dpb dpd dpi dpp dpr dps dpt dra drb drd dri drp drr drs drt dsa dsb dsd dsi dsp dsr dss dst dta dtb dtd dti dtp dtr dts dtt i-d ia- iaa iab iad iai iap iar ias iat iba ibb ibd ibi ibp ibr ibs ibt ida idb idd idi idp idr ids idt iia iib iid iii iip iir iis iit ipa ipb ipd ipi ipp ipr ips ipt ir- ira irb ird iri irp irr irs irt is- isa isb isd isi isp isr iss ist ita itb itd iti itp its itt p-p paa pab pad pai pap par pas pat pba pbb pbd pbi pbp pbr pbs pbt pda pdb pdd pdi pdp pdr pds pdt pia pib pid pii pip pir pis pit ppa ppb ppd ppi ppp ppr pps ppt pra prb prd pri prp prr prs prt ps- psa psb psd psi psp psr pss pst pt- pta ptb ptd pti ptp ptr pts ptt ra- raa rab rad rai rap rar ras rat rba rbb rbd rbi rbp rbr rbs rbt rda rdb rdd rdi rdp rdr rds rdt ria rib rid rii rip rir ris rit rpa rpb rpd rpi rpp rpr rps rpt rra rrb rrd rri rrp rrr rrs rrt rsa rsb rsd rsi rsp rsr rss rst rta rtb rtd rti rtp rtr rts rtt saa sab sad sai sap sar sas sat sba sbb sbd sbi sbp sbr sbs sbt sda sdb sdd sdi sdp sdr sds sdt sia sib sid sii sip sir sis sit spa spb spd spi spp spr sps spt sr- sra srb srd sri srp srr srs srt ss- ssa ssb ssd ssi ssp ssr sss sst sta stb std sti stp str sts stt taa tab tad tai tap tar tas tat tba tbb tbd tbi tbp tbr tbs tbt tda tdb tdd tdi tdp tdr tds tdt tia tib tid tii tip tir tis tit tpa tpb tpd tpi tpp tpr tps tpt tra trb trd tri trp trr trs trt tsa tsb tsd tsi tsp tsr tss tst tta ttb ttd tti ttp ttr tts ttt