bbb bbd bbe bbi bbo bbs bbt bdb bdd bde bdi bdo bds bdt be- beb bed bee bei beo bes bet bi- bib bid bie bii bio bis bit bob bod boe boi boo bos bot bsb bsd bse bsi bso bss bst btb btd bte bti bto bts btt dbb dbd dbe dbi dbo dbs dbt ddb ddd dde ddi ddo dds ddt de- deb ded dee dei deo des det di- dib did die dii dio dis dit dob dod doe doi doo dos dot dsb dsd dse dsi dso dss dst dtb dtd dte dti dto dts dtt ebb ebd ebe ebi ebo ebs ebt ed- edb edd ede edi edo eds edt eeb eed eee eeo ees eet eib eid eie eii eio eis eit eo- eob eod eoe eoi eoo eos eot es- esb esd ese esi eso ess est etb etd ete eti eto ets ett i-d ibb ibd ibe ibi ibo ibs ibt idb idd ide idi ido ids idt ie- ied iee iei ies iet iib iid iie iii iio iis iit io- iob iod ioe ioi ioo ios iot is- isb isd ise isi iso iss ist itb itd ite iti ito its itt o-i ob- obb obd obe obi obo obs obt odb odd ode odi odo ods odt oeb oed oee oei oeo oes oet oib oid oie oii oio ois oit oo- oob ood ooi ooo oos oot os- osb osd ose osi oso oss ost ot- otb otd ote oti oto ots ott sbb sbd sbe sbi sbo sbs sbt sdb sdd sde sdi sdo sds sdt se- seb sed see sei seo ses set sib sid sie sii sio sis sit sob sod soe soi soo sos sot ss- ssb ssd sse ssi sso sss sst stb std ste sti sto sts stt tbb tbd tbe tbi tbo tbs tbt tdb tdd tde tdi tdo tds tdt te- teb ted tee tei teo tes tet tib tid tie tii tio tis tit to- tob tod toe toi too tos tot tsb tsd tse tsi tso tss tst ttb ttd tte tti tto tts ttt