-ous bbbb bbbs bcbc bcbs bccc bccs bcos bcsc bcss bcuc bobb bobo bobs bobu bock boco bocs bocu boko boks boku boob booc book boos bosc bosk boso boss bosu bouk bous bscs bsos bssc bubb bubo bubs bubu bucc buck buco bucs bucu bukk buko buku busc busk buss busu buus c-bo cbbc cbbs cbcc cbcs cbcu cbko cbsc cbus ccbc cccb cccc cccs cccu ccob ccoc ccss ccuc ccus ckbc ckck ckco ckcs ckob ckoc ckoo ckos cksb ckso cobb cobo cobs cobu cock coco cocu cok- coko coob cook coos cosc coso coss coub couk cous cscb cscc csco cscs csks csob csos csus cub- cubb cubs cucc cuck cuk- cusb cusk cuso cuss cusu k-os kbbb kbbc kbbk kbbo kbbs kbbu kbcb kbck kbco kbcs kbcu kbkb kbkk kbko kbob kboc kbok kboo kbos kbsb kbsk kbso kbss kbsu kbub kbuc kbuk kbus kbuu kcbc kcbk kcbs kcbu kccb kccc kcck kccu kckc kckk kcko kcob kcos kcou kcsb kcsc kcss kcsu kcub kcuk kkbb kkbo kkbs kkcb kkck kkco kkcs kkkk kkob kkoo kkss kksu kkus kkuu kobb kobc kobk kobo kobs kobu kocb kock kocs kokb kokc kokk koko koks koku koob kooc kook kooo koos koou kos- kosb kosc koso koss kosu koub kous kouu ksbc ksbs kscb ksck ksco kscs kscu kskb kskk ksko ksks ksku ksob ksoc ksok ksoo ksos ksou ksso ksss kssu ksub ksuu kubb kubc kubo kubs kubu kucb kucc kuco kukk kuks kuku kuok kuoo kuos kusb kusc kuso kusu kuub kuuk kuuu obbo obkb obok obos obss obus ocbc occc ocks ocos okcu okko okok okso okus ooku oooo ooos oous oscc osco osku osoo osos ossb osso ossu oubs oucc ouu- s-os sbbs sbcc sbcs sbus sccc sccs sck- scob scok scoo scsc scso scsu scub skss sobo sobs sobu sock soco socs sokk soko soku sook soos soso soss souk sous sscc sscs ssoc sssb sssc ssss sub- subb subo subs suc- succ suck sucs suks suku suos sus- susk suso suss susu suus ubbo uboc ubos ucbc ucos ucsb ucsc ucsu ukcc ukko ukok uksc uocc us-k usbc usbs uscc usco uscs usoc usos ussb ussc usss ussu usus uuoc uuuu