-ol bbb bbd bbi bbl bbo bbs bdb bdd bdi bdl bdo bds bi- bib bid bii bil bio bis blb bld bli bll blo bls bob bod boi bol boo bos bsb bsd bsi bsl bso bss dbb dbd dbi dbl dbo dbs ddb ddd ddi ddl ddo dds di- dib did dii dil dio dis dl- dlb dld dli dll dlo dls dob dod doi dol doo dos dsb dsd dsi dsl dso dss i-d ibb ibd ibi ibl ibo ibs idb idd idi idl ido ids iib iid iii iil iio iis il- ilb ild ili ill ilo ils io- iob iod ioi iol ioo ios is- isb isd isi isl iso iss lbb lbd lbi lbl lbo lbs ldb ldd ldi ldl ldo lds lib lid lii lil lio lis llb lld lli lll llo lls lob lod loi lol loo los lsb lsd lsi lsl lso lss o-i ob- obb obd obi obl obo obs odb odd odi odl odo ods oib oid oii oil oio ois olb old oli oll olo ols oo- oob ood ooi ool ooo oos os- osb osd osi osl oso oss sbb sbd sbi sbl sbo sbs sdb sdd sdi sdl sdo sds sib sid sii sil sio sis slb sld sli sll slo sls sob sod soi sol soo sos ss- ssb ssd ssi ssl sso sss