bbb bbd bbi bbl bbs bbt bdb bdd bdi bdl bds bdt bi- bib bid bii bil bis bit blb bld bli bll bls blt bsb bsd bsi bsl bss bst btb btd bti btl bts btt dbb dbd dbi dbl dbs dbt ddb ddd ddi ddl dds ddt di- dib did dii dil dis dit dl- dlb dld dli dll dls dlt dsb dsd dsi dsl dss dst dtb dtd dti dtl dts dtt i-d ibb ibd ibi ibl ibs ibt idb idd idi idl ids idt iib iid iii iil iis iit il- ilb ild ili ill ils ilt is- isb isd isi isl iss ist itb itd iti itl its itt lbb lbd lbi lbl lbs lbt ldb ldd ldi ldl lds ldt lib lid lii lil lis lit llb lld lli lll lls llt lsb lsd lsi lsl lss lst ltb ltd lti ltl lts ltt sbb sbd sbi sbl sbs sbt sdb sdd sdi sdl sds sdt sib sid sii sil sis sit slb sld sli sll sls slt ss- ssb ssd ssi ssl sss sst stb std sti stl sts stt tbb tbd tbi tbl tbs tbt tdb tdd tdi tdl tds tdt tib tid tii til tis tit tld tli tll tls tlt tsb tsd tsi tsl tss tst ttb ttd tti ttl tts ttt