bbbb bboy bbyo bcbc bccc bcuc bkcy bobb bobo bobu boby bock boco bocu boko boku boob booc book bouk bouy boyo bubb bubo bubu bucc buck buco bucu bukk buko buku buky buoy buyo buyu byck byob byoc c-bo cbbc cbcc cbcu cbko ccbc cccb cccc cccu ccob ccoc ccuc ckbc ckck ckco ckcy ckob ckoc ckoo ckoy cobb cobo cobu coby cock coco cocu cok- coko coky coob cook coub couk couy coyo cub- cubb cuby cucc cuck cuk- cuy- cuyo cybb cybc cybo cyc- cycb cycc cyy- cyyc kbbb kbbc kbbk kbbo kbbu kbcb kbck kbco kbcu kbcy kbkb kbkk kbko kbky kbob kboc kbok kboo kbub kbuc kbuk kbuu kbuy kbyb kbyo kbyu kcbc kcbk kcbu kccb kccc kcck kccu kccy kckc kckk kcko kcky kcob kcou kcub kcuk kcyk kcyy kkbb kkbo kkcb kkck kkco kkcy kkkk kkob kkoo kkoy kkuu kkyc kkyy kobb kobc kobk kobo kobu koby kocb kock kokb kokc kokk koko koku koky koob kooc kook kooo koou koub kouu koyo koyy kubb kubc kubo kubu kuby kucb kucc kuco kukk kuku kuky kuok kuoo kuub kuuk kuuu kuyo kuyu kuyy kybb kybc kybo kyby kycc kyck kykc kykk kyky kyok kyoo kyoy kyuk kyuu kyyk kyyo kyyy obbo obby obkb obok oboy ocbc occc okby okcu okko okok okyo ooby ooku ooky oooo oucc ouu- oyou ubbo uboc ucbc ucky ukcc ukko ukky ukok ukyo uocc uuoc uuuu yccc ykko yobo yock yoko yoky yook youb youk yoyo yubu yuck yuko yuku yuky yuyu yyyy