a-a a-b a-i a-t aaa aab aad aai aao aap aar aas aat ab- aba abb abd abi abo abp abr abs abt ad- ada adb add adi ado adp adr ads adt ai- aia aib aid aii aio aip air ais ait aoa aob aod aoi aoo aop aor aos aot ap- apa apb apd api apo app apr aps apt ar- ara arb ard ari aro arp arr ars art as- asa asb asd asi aso asp asr ass ast at- ata atb atd ati ato atp atr ats att b-p baa bab bad bai bao bap bar bas bat bba bbb bbd bbi bbo bbp bbr bbs bbt bda bdb bdd bdi bdo bdp bdr bds bdt bi- bia bib bid bii bio bip bir bis bit boa bob bod boi boo bop bor bos bot bpa bpb bpd bpi bpo bpp bpr bps bpt bra brb brd bri bro brp brr brs brt bsa bsb bsd bsi bso bsp bsr bss bst bta btb btd bti bto btp btr bts btt daa dab dad dai dao dap dar das dat dba dbb dbd dbi dbo dbp dbr dbs dbt dda ddb ddd ddi ddo ddp ddr dds ddt di- dia dib did dii dio dip dir dis dit doa dob dod doi doo dop dor dos dot dpa dpb dpd dpi dpo dpp dpr dps dpt dra drb drd dri dro drp drr drs drt dsa dsb dsd dsi dso dsp dsr dss dst dta dtb dtd dti dto dtp dtr dts dtt i-d ia- iaa iab iad iai iao iap iar ias iat iba ibb ibd ibi ibo ibp ibr ibs ibt ida idb idd idi ido idp idr ids idt iia iib iid iii iio iip iir iis iit io- ioa iob iod ioi ioo iop ior ios iot ipa ipb ipd ipi ipo ipp ipr ips ipt ir- ira irb ird iri iro irp irr irs irt is- isa isb isd isi iso isp isr iss ist ita itb itd iti ito itp its itt o-i oaa oab oad oai oao oap oar oas oat ob- oba obb obd obi obo obp obr obs obt oda odb odd odi odo odp odr ods odt oia oib oid oii oio oip oir ois oit oo- ooa oob ood ooi ooo oop oor oos oot op- opa opb opd opi opo opp opr ops opt or- ora orb ord ori oro orp orr ors ort os- osa osb osd osi oso osp osr oss ost ot- ota otb otd oti oto otp otr ots ott p-p paa pab pad pai pao pap par pas pat pba pbb pbd pbi pbo pbp pbr pbs pbt pda pdb pdd pdi pdo pdp pdr pds pdt pia pib pid pii pio pip pir pis pit poa pob pod poi poo pop por pos pot ppa ppb ppd ppi ppo ppp ppr pps ppt pra prb prd pri pro prp prr prs prt ps- psa psb psd psi pso psp psr pss pst pt- pta ptb ptd pti pto ptp ptr pts ptt ra- raa rab rad rai rao rap rar ras rat rba rbb rbd rbi rbo rbp rbr rbs rbt rda rdb rdd rdi rdo rdp rdr rds rdt ria rib rid rii rio rip rir ris rit roa rob rod roi roo rop ror ros rot rpa rpb rpd rpi rpo rpp rpr rps rpt rra rrb rrd rri rrp rrr rrs rrt rsa rsb rsd rsi rso rsp rsr rss rst rta rtb rtd rti rto rtp rtr rts rtt saa sab sad sai sao sap sar sas sat sba sbb sbd sbi sbo sbp sbr sbs sbt sda sdb sdd sdi sdo sdp sdr sds sdt sia sib sid sii sio sip sir sis sit soa sob sod soi soo sop sor sos sot spa spb spd spi spo spp spr sps spt sr- sra srb srd sri sro srp srr srs srt ss- ssa ssb ssd ssi sso ssp ssr sss sst sta stb std sti sto stp str sts stt taa tab tad tai tao tap tar tas tat tba tbb tbd tbi tbo tbp tbr tbs tbt tda tdb tdd tdi tdo tdp tdr tds tdt tia tib tid tii tio tip tir tis tit to- toa tob tod toi too top tor tos tot tpa tpb tpd tpi tpo tpp tpr tps tpt tra trb trd tri tro trp trr trs trt tsa tsb tsd tsi tso tsp tsr tss tst tta ttb ttd tti tto ttp ttr tts ttt