-ous bbbb bbbs bcbc bcbs bccc bccs bcos bcsc bcss bcuc bobb bobo bobs bobu boco bocs bocu boob booc boos bosc boso boss bosu bous bscs bsos bssc bubb bubo bubs bubu bucc buco bucs bucu busc buss busu buus c-bo cbbc cbbs cbcc cbcs cbcu cbsc cbus ccbc cccb cccc cccs cccu ccob ccoc ccss ccuc ccus cobb cobo cobs cobu coco cocu coob coos cosc coso coss coub cous cscb cscc csco cscs csob csos csus cub- cubb cubs cucc cusb cuso cuss cusu obbo obos obss obus ocbc occc ocos oooo ooos oous oscc osco osoo osos ossb osso ossu oubs oucc ouu- s-os sbbs sbcc sbcs sbus sccc sccs scob scoo scsc scso scsu scub sobo sobs sobu soco socs soos soso soss sous sscc sscs ssoc sssb sssc ssss sub- subb subo subs suc- succ sucs suos sus- suso suss susu suus ubbo uboc ubos ucbc ucos ucsb ucsc ucsu uocc usbc usbs uscc usco uscs usoc usos ussb ussc usss ussu usus uuoc uuuu