bbb bbd bbi bbo bbr bbs bbt bdb bdd bdi bdo bdr bds bdt bi- bib bid bii bio bir bis bit bob bod boi boo bor bos bot brb brd bri bro brr brs brt bsb bsd bsi bso bsr bss bst btb btd bti bto btr bts btt dbb dbd dbi dbo dbr dbs dbt ddb ddd ddi ddo ddr dds ddt di- dib did dii dio dir dis dit dob dod doi doo dor dos dot drb drd dri dro drr drs drt dsb dsd dsi dso dsr dss dst dtb dtd dti dto dtr dts dtt i-d ibb ibd ibi ibo ibr ibs ibt idb idd idi ido idr ids idt iib iid iii iio iir iis iit io- iob iod ioi ioo ior ios iot ir- irb ird iri iro irr irs irt is- isb isd isi iso isr iss ist itb itd iti ito its itt o-i ob- obb obd obi obo obr obs obt odb odd odi odo odr ods odt oib oid oii oio oir ois oit oo- oob ood ooi ooo oor oos oot or- orb ord ori oro orr ors ort os- osb osd osi oso osr oss ost ot- otb otd oti oto otr ots ott rbb rbd rbi rbo rbr rbs rbt rdb rdd rdi rdo rdr rds rdt rib rid rii rio rir ris rit rob rod roi roo ror ros rot rrb rrd rri rrr rrs rrt rsb rsd rsi rso rsr rss rst rtb rtd rti rto rtr rts rtt sbb sbd sbi sbo sbr sbs sbt sdb sdd sdi sdo sdr sds sdt sib sid sii sio sir sis sit sob sod soi soo sor sos sot sr- srb srd sri sro srr srs srt ss- ssb ssd ssi sso ssr sss sst stb std sti sto str sts stt tbb tbd tbi tbo tbr tbs tbt tdb tdd tdi tdo tdr tds tdt tib tid tii tio tir tis tit to- tob tod toi too tor tos tot trb trd tri tro trr trs trt tsb tsd tsi tso tsr tss tst ttb ttd tti tto ttr tts ttt