-ol bbb bbd bbi bbl bbo bbs bbt bdb bdd bdi bdl bdo bds bdt bi- bib bid bii bil bio bis bit blb bld bli bll blo bls blt bob bod boi bol boo bos bot bsb bsd bsi bsl bso bss bst btb btd bti btl bto bts btt dbb dbd dbi dbl dbo dbs dbt ddb ddd ddi ddl ddo dds ddt di- dib did dii dil dio dis dit dl- dlb dld dli dll dlo dls dlt dob dod doi dol doo dos dot dsb dsd dsi dsl dso dss dst dtb dtd dti dtl dto dts dtt i-d ibb ibd ibi ibl ibo ibs ibt idb idd idi idl ido ids idt iib iid iii iil iio iis iit il- ilb ild ili ill ilo ils ilt io- iob iod ioi iol ioo ios iot is- isb isd isi isl iso iss ist itb itd iti itl ito its itt lbb lbd lbi lbl lbo lbs lbt ldb ldd ldi ldl ldo lds ldt lib lid lii lil lio lis lit llb lld lli lll llo lls llt lob lod loi lol loo los lot lsb lsd lsi lsl lso lss lst ltb ltd lti ltl lto lts ltt o-i ob- obb obd obi obl obo obs obt odb odd odi odl odo ods odt oib oid oii oil oio ois oit olb old oli oll olo ols olt oo- oob ood ooi ool ooo oos oot os- osb osd osi osl oso oss ost ot- otb otd oti otl oto ots ott sbb sbd sbi sbl sbo sbs sbt sdb sdd sdi sdl sdo sds sdt sib sid sii sil sio sis sit slb sld sli sll slo sls slt sob sod soi sol soo sos sot ss- ssb ssd ssi ssl sso sss sst stb std sti stl sto sts stt tbb tbd tbi tbl tbo tbs tbt tdb tdd tdi tdl tdo tds tdt tib tid tii til tio tis tit tld tli tll tlo tls tlt to- tob tod toi tol too tos tot tsb tsd tsi tsl tso tss tst ttb ttd tti ttl tto tts ttt