b-p bbb bbd bbi bbo bbp bbr bbs bbt bdb bdd bdi bdo bdp bdr bds bdt bi- bib bid bii bio bip bir bis bit bob bod boi boo bop bor bos bot bpb bpd bpi bpo bpp bpr bps bpt brb brd bri bro brp brr brs brt bsb bsd bsi bso bsp bsr bss bst btb btd bti bto btp btr bts btt dbb dbd dbi dbo dbp dbr dbs dbt ddb ddd ddi ddo ddp ddr dds ddt di- dib did dii dio dip dir dis dit dob dod doi doo dop dor dos dot dpb dpd dpi dpo dpp dpr dps dpt drb drd dri dro drp drr drs drt dsb dsd dsi dso dsp dsr dss dst dtb dtd dti dto dtp dtr dts dtt i-d ibb ibd ibi ibo ibp ibr ibs ibt idb idd idi ido idp idr ids idt iib iid iii iio iip iir iis iit io- iob iod ioi ioo iop ior ios iot ipb ipd ipi ipo ipp ipr ips ipt ir- irb ird iri iro irp irr irs irt is- isb isd isi iso isp isr iss ist itb itd iti ito itp its itt o-i ob- obb obd obi obo obp obr obs obt odb odd odi odo odp odr ods odt oib oid oii oio oip oir ois oit oo- oob ood ooi ooo oop oor oos oot op- opb opd opi opo opp opr ops opt or- orb ord ori oro orp orr ors ort os- osb osd osi oso osp osr oss ost ot- otb otd oti oto otp otr ots ott p-p pbb pbd pbi pbo pbp pbr pbs pbt pdb pdd pdi pdo pdp pdr pds pdt pib pid pii pio pip pir pis pit pob pod poi poo pop por pos pot ppb ppd ppi ppo ppp ppr pps ppt prb prd pri pro prp prr prs prt ps- psb psd psi pso psp psr pss pst pt- ptb ptd pti pto ptp ptr pts ptt rbb rbd rbi rbo rbp rbr rbs rbt rdb rdd rdi rdo rdp rdr rds rdt rib rid rii rio rip rir ris rit rob rod roi roo rop ror ros rot rpb rpd rpi rpo rpp rpr rps rpt rrb rrd rri rrp rrr rrs rrt rsb rsd rsi rso rsp rsr rss rst rtb rtd rti rto rtp rtr rts rtt sbb sbd sbi sbo sbp sbr sbs sbt sdb sdd sdi sdo sdp sdr sds sdt sib sid sii sio sip sir sis sit sob sod soi soo sop sor sos sot spb spd spi spo spp spr sps spt sr- srb srd sri sro srp srr srs srt ss- ssb ssd ssi sso ssp ssr sss sst stb std sti sto stp str sts stt tbb tbd tbi tbo tbp tbr tbs tbt tdb tdd tdi tdo tdp tdr tds tdt tib tid tii tio tip tir tis tit to- tob tod toi too top tor tos tot tpb tpd tpi tpo tpp tpr tps tpt trb trd tri tro trp trr trs trt tsb tsd tsi tso tsp tsr tss tst ttb ttd tti tto ttp ttr tts ttt