bbbb bbbs bblb bbls blbt blkb blls blob blok bloo blot blss blst blts bobb bobo bobs boko boks bolk boll bolo bols bolt boob book bool boos boot bosk boso boss bost botb boto bots bott bskt bsos bsts btob btss bttb k-lo k-os kbbb kbbk kbbl kbbo kbbs kbbt kbkb kbkk kbkl kbko kblb kbll kblo kbls kblt kbob kbok kboo kbos kbot kbsb kbsk kbso kbss kbst kbtb kbtk kbtl kbto kbts kbtt kkbb kkbl kkbo kkbs kkbt kkkk kklb kkll kklo kkls kkob kkol kkoo kkot kkss kkst kktk kktl kkts klbb klbl klbs klbt klkk klkl klko klks kllb kllk klls klob klok klol kloo klos klst kltk klto kltt kobb kobk kobo kobs kokb kokk koko koks kolb kolk koll kolo kols kolt koob kook kool kooo koos koot kos- kosb koso koss kost kotb kotk koto kots kott ksbl ksbs kskb kskk ksko ksks kslb kslk ksll kslo kslt ksob ksok ksol ksoo ksos kssl ksso ksss ksst kstb kstk kstl ksto ksts kstt ktbb ktbl ktbt ktkb ktkk ktko ktks ktkt ktlb ktlk ktlo ktlt ktob ktok ktoo ktot ktsl ktso ktst kttk ktto ktts kttt lbos llbs llks llll lloo lob- lobb lobo lobs lokk loko loll lolo lols loob look lool loos loot loso loss lost lotl loto lots lott lsso lsts ltbl obbo obkb obls obok obol obos obot obss obst obts okko oklo okok okol okot okso okto olbo ollo olos olot olst oolo oooo ooos oost ootb oots oslo osoo osos ossb osso osts otbs oto- otok otoo otos otso otto otts s-os sbbs sbot sbst sbtk skol skot skss slob sloo slos slot slst slts sobo sobs sobt sokk soko solk soll solo sols solt sook sool soos soot soso soss sost sotk sotl soto sots sslt ssot sssb ssss sstb sstl ssts stbs stks stlo stlt stob stok stol stoo stos stot stss tbbs tbst tkol tkos tkts tlos tobo tobs tobt toko tol- tolk toll tolo tolt took tool toos toot tosb tosk toso toss tost toto tots tott tsks tsob tsol tsos tsst tsts ttbb ttss tttt