a-a a-b a-t aaa aab aad aae aap aas aat ab- aba abb abd abe abp abs abt ad- ada adb add ade adp ads adt aea aeb aed aee aep aes aet ap- apa apb apd ape app aps apt as- asa asb asd ase asp ass ast at- ata atb atd ate atp ats att b-p baa bab bad bae bap bas bat bba bbb bbd bbe bbp bbs bbt bda bdb bdd bde bdp bds bdt be- bea beb bed bee bep bes bet bpa bpb bpd bpe bpp bps bpt bsa bsb bsd bse bsp bss bst bta btb btd bte btp bts btt daa dab dad dae dap das dat dba dbb dbd dbe dbp dbs dbt dda ddb ddd dde ddp dds ddt de- dea deb ded dee dep des det dpa dpb dpd dpe dpp dps dpt dsa dsb dsd dse dsp dss dst dta dtb dtd dte dtp dts dtt eaa eab ead eae eap eas eat eba ebb ebd ebe ebp ebs ebt ed- eda edb edd ede edp eds edt eea eeb eed eee eep ees eet ep- epa epb epd epe epp eps ept es- esa esb esd ese esp ess est eta etb etd ete etp ets ett p-p paa pab pad pae pap pas pat pba pbb pbd pbe pbp pbs pbt pda pdb pdd pde pdp pds pdt pea peb ped pee pep pes pet ppa ppb ppd ppe ppp pps ppt ps- psa psb psd pse psp pss pst pt- pta ptb ptd pte ptp pts ptt saa sab sad sae sap sas sat sba sbb sbd sbe sbp sbs sbt sda sdb sdd sde sdp sds sdt se- sea seb sed see sep ses set spa spb spd spe spp sps spt ss- ssa ssb ssd sse ssp sss sst sta stb std ste stp sts stt taa tab tad tae tap tas tat tba tbb tbd tbe tbp tbs tbt tda tdb tdd tde tdp tds tdt te- tea teb ted tee tep tes tet tpa tpb tpd tpe tpp tps tpt tsa tsb tsd tse tsp tss tst tta ttb ttd tte ttp tts ttt