bbb bbd bbi bbl bbs bdb bdd bdi bdl bds bi- bib bid bii bil bis blb bld bli bll bls bsb bsd bsi bsl bss dbb dbd dbi dbl dbs ddb ddd ddi ddl dds di- dib did dii dil dis dl- dlb dld dli dll dls dsb dsd dsi dsl dss i-d ibb ibd ibi ibl ibs idb idd idi idl ids iib iid iii iil iis il- ilb ild ili ill ils is- isb isd isi isl iss lbb lbd lbi lbl lbs ldb ldd ldi ldl lds lib lid lii lil lis llb lld lli lll lls lsb lsd lsi lsl lss sbb sbd sbi sbl sbs sdb sdd sdi sdl sds sib sid sii sil sis slb sld sli sll sls ss- ssb ssd ssi ssl sss