-ous bbbb bbbs bmus bobb bobo bobs bobu boko boks boku bomb boms bomu boob book boom boos bosk bosm boso boss bosu bouk boum bous bsms bsos bssm bubb bubo bubs bubu bukk buko buku bum- bumb bums busk buss busu buus k-os kbbb kbbk kbbm kbbo kbbs kbbu kbkb kbkk kbko kbmb kbmo kbms kbob kbok kboo kbos kbsb kbsk kbsm kbso kbss kbsu kbub kbuk kbus kbuu kkbb kkbo kkbs kkkk kkmk kkmo kkms kkob kkoo kksm kkss kksu kkus kkuu kmbs kmkk kmko kmks kmmk kmmm kmmo kmms kmob kmok kmom kmou kmsb kmso kmss kmsu kmus kobb kobk kobo kobs kobu kokb kokk koko koks koku komb komo koms koob kook kooo koos koou kos- kosb koso koss kosu koub koum kous kouu ksbs kskb kskk ksko ksks ksku ksmb ksmm ksmo ksms ksmu ksob ksok ksom ksoo ksos ksou kssm ksso ksss kssu ksub ksum ksuu kubb kubo kubs kubu kukk kuks kuku kumm kumo kumu kuok kuoo kuos kusb kuso kusu kuub kuuk kuuu mbbs mbms mbou mbus mkks mksm mmmm mmms mmsu mmus mobb mobo mobs moko momo moms momu moob mook moos mosk moso moss mosu mouk mous msmb msmm msms msmu mssm msus mubo mubs muko mumm mumo mums mumu muos musk muso muss musu obbo obkb obok obos obss obus okko okmo okok okom okso okus ombo ombu omo- omoo omsk omuo omus ooku ooms oooo ooos oous osku osm- osmo osoo osos ossb osso ossu osum oubs ouu- s-os sbbs sbus skss skum smkb smok smos smss smus sobo sobs sobu sokk soko soku somb somm somo sook soom soos soso soss souk soum sous sssb sssm ssss sub- subb subm subo subs suks suku sum- sumo sums sumu suos sus- susk suso suss susu suum suus ubbo ubos ukko ukok ukum umb- umbo ummo umms umok umsu umus uomo us-k usbs usmm usms usos ussb usss ussu usus uuuu