-ol bbb bbd bbe bbl bbo bbs bdb bdd bde bdl bdo bds be- beb bed bee bel beo bes blb bld ble bll blo bls bob bod boe bol boo bos bsb bsd bse bsl bso bss dbb dbd dbe dbl dbo dbs ddb ddd dde ddl ddo dds de- deb ded dee del deo des dl- dlb dld dle dll dlo dls dob dod doe dol doo dos dsb dsd dse dsl dso dss ebb ebd ebe ebl ebo ebs ed- edb edd ede edl edo eds eeb eed eee eel eeo ees elb eld ele ell elo els eo- eob eod eoe eol eoo eos es- esb esd ese esl eso ess lbb lbd lbe lbl lbo lbs ldb ldd lde ldl ldo lds leb led lee lel leo les llb lld lle lll llo lls lob lod loe lol loo los lsb lsd lse lsl lso lss ob- obb obd obe obl obo obs odb odd ode odl odo ods oeb oed oee oel oeo oes olb old ole oll olo ols oo- oob ood ool ooo oos os- osb osd ose osl oso oss sbb sbd sbe sbl sbo sbs sdb sdd sde sdl sdo sds se- seb sed see sel seo ses slb sld sle sll slo sls sob sod soe sol soo sos ss- ssb ssd sse ssl sso sss