bbbb bbbs bksp bobb bobo bobs boko boks boob book boop boos bopp bops bosk boso boss bsos bspp k-os kbbb kbbk kbbo kbbs kbkb kbkk kbko kbob kbok kboo kbos kbpk kbpo kbps kbsb kbsk kbso kbss kkbb kkbo kkbs kkkk kkob kkoo kkpk kkps kksp kkss kobb kobk kobo kobs kokb kokk koko kokp koks koob kook kooo koop koos kopb kopp kops kos- kosb koso kosp koss kpbb kpbs kpkk kpob kpok kpoo kpop kppk kppo kppp kpso kpsp ksbp ksbs kskb kskk ksko ksks ksob ksok ksoo ksop ksos kspb kspk kspo ksps ksso ksss obbo obkb obok obos obss okko okok okpo okso oooo ooos oops opo- opos oppo opps osbp osoo osos ossb osso pbpk pbsp pobo pobs poko pook poop poos pop- popo popp pops posb posk poso poss ppos pppo pppp ppps ppss psos pspp psps psso s-os sbbs sbsp skop skpo skss sobo sobp sobs sokk soko sook soop soos sopo sopp sops soso soss spok spoo spop spos spps spso spsp spss ssop sspo ssps sssb ssss