bbb bbi bbl bbs bbt bbw bi- bib bii bil bis bit biw blb bli bll bls blt bsb bsi bsl bss bst bsw btb bti btl bts btt btw bwb bwi bwl bws ibb ibi ibl ibs ibt ibw iib iii iil iis iit iiw il- ilb ili ill ils ilt is- isb isi isl iss ist isw itb iti itl its itt iwb iwi iwl iws iwt iww lbb lbi lbl lbs lbt lbw lib lii lil lis lit liw llb lli lll lls llt llw lsb lsi lsl lss lst lsw ltb lti ltl lts ltt lwb lwi lwl lws lww sbb sbi sbl sbs sbt sbw sib sii sil sis sit siw slb sli sll sls slt ss- ssb ssi ssl sss sst ssw stb sti stl sts stt stw swb swi swl sws swt tbb tbi tbl tbs tbt tib tii til tis tit tiw tli tll tls tlt tlw tsb tsi tsl tss tst tsw ttb tti ttl tts ttt ttw twb twi twl tws twt tww wbb wbi wbs wbt wbw wib wii wil wis wit wl- wlb wli wll wls wlt wlw wsb wsi wsl wss wst wsw wtb wti wts wtt wtw wwi wwl wwt www