b-p bbb bbd bbe bbi bbo bbp bbs bbt bdb bdd bde bdi bdo bdp bds bdt be- beb bed bee bei beo bep bes bet bi- bib bid bie bii bio bip bis bit bob bod boe boi boo bop bos bot bpb bpd bpe bpi bpo bpp bps bpt bsb bsd bse bsi bso bsp bss bst btb btd bte bti bto btp bts btt dbb dbd dbe dbi dbo dbp dbs dbt ddb ddd dde ddi ddo ddp dds ddt de- deb ded dee dei deo dep des det di- dib did die dii dio dip dis dit dob dod doe doi doo dop dos dot dpb dpd dpe dpi dpo dpp dps dpt dsb dsd dse dsi dso dsp dss dst dtb dtd dte dti dto dtp dts dtt ebb ebd ebe ebi ebo ebp ebs ebt ed- edb edd ede edi edo edp eds edt eeb eed eee eeo eep ees eet eib eid eie eii eio eip eis eit eo- eob eod eoe eoi eoo eop eos eot ep- epb epd epe epi epo epp eps ept es- esb esd ese esi eso esp ess est etb etd ete eti eto etp ets ett i-d ibb ibd ibe ibi ibo ibp ibs ibt idb idd ide idi ido idp ids idt ie- ied iee iei iep ies iet iib iid iie iii iio iip iis iit io- iob iod ioe ioi ioo iop ios iot ipb ipd ipe ipi ipo ipp ips ipt is- isb isd ise isi iso isp iss ist itb itd ite iti ito itp its itt o-i ob- obb obd obe obi obo obp obs obt odb odd ode odi odo odp ods odt oeb oed oee oei oeo oep oes oet oib oid oie oii oio oip ois oit oo- oob ood ooi ooo oop oos oot op- opb opd ope opi opo opp ops opt os- osb osd ose osi oso osp oss ost ot- otb otd ote oti oto otp ots ott p-p pbb pbd pbe pbi pbo pbp pbs pbt pdb pdd pde pdi pdo pdp pds pdt peb ped pee pei peo pep pes pet pib pid pie pii pio pip pis pit pob pod poe poi poo pop pos pot ppb ppd ppe ppi ppo ppp pps ppt ps- psb psd pse psi pso psp pss pst pt- ptb ptd pte pti pto ptp pts ptt sbb sbd sbe sbi sbo sbp sbs sbt sdb sdd sde sdi sdo sdp sds sdt se- seb sed see sei seo sep ses set sib sid sie sii sio sip sis sit sob sod soe soi soo sop sos sot spb spd spe spi spo spp sps spt ss- ssb ssd sse ssi sso ssp sss sst stb std ste sti sto stp sts stt tbb tbd tbe tbi tbo tbp tbs tbt tdb tdd tde tdi tdo tdp tds tdt te- teb ted tee tei teo tep tes tet tib tid tie tii tio tip tis tit to- tob tod toe toi too top tos tot tpb tpd tpe tpi tpo tpp tps tpt tsb tsd tse tsi tso tsp tss tst ttb ttd tte tti tto ttp tts ttt