bbbb bboy bbwc bbyo bcbc bccc bctc bobb bobo bobw boby boco boob booc boot boow botb boto bott botw boty bowt bowy boyo btcc btob bttb btwc btwo bwoc bwoy byob byoc c-bo cbbc cbcc cbct cbot cbtc cbyt cbyw ccbc cccb cccc ccob ccoc ccow cctb cctc cctt cobb cobo coby coco coct coob coot cotb cotc coto cott cotw coty cowt cowy coyo coyt ctot cttw cwot cybb cybc cybo cyc- cycb cycc cyt- cytb cyto cyy- cyyc obbo obby obot oboy ocbc occc occt oct- octo octy ooby oooo ootb ootw ooty oto- otoo otow otoy otto otwo owow owt- owtt tbcb tbcc tcby tccc tctc to-y tobo tobt toby toco toot totc toto tott toty towy toyb toyo toyt ttbb ttoy tttt twbt two- twob twoc twoo twot twy- tybo tyco tyto tytt tyty wbbb wbbo wbbt wbbw wbcb wbco wbct wbcw wbcy wbob wboc wbow wbtc wbto wbtt wbtw wbty wbwb wbwc wbwo wbwt wbyb wbyo wbyt wbyw wbyy wcbc wcbt wcbw wcby wccb wccc wcco wcct wccw wccy wcob wcoc wcoo wcot wcoy wctb wctc wcto wctt wctw wcty wcwb wcwc wcyb wcyo wcyt wcyy wobb wobc wobo wobt wocb wocc woco wocy woob wooc woot woow wooy wotb wotc wott wotw wowb wowc wowo wowt woww wowy wtbb wtbc wtbo wtcb wtcc wtco wtct wtcw wtcy wtob wtoc wtot wtow wtoy wttb wttc wtto wttt wttw wtty wtwb wtwo wtwt wtww wtyb wtyc wwbb wwbc wwbt wwcb wwco wwct wwcw wwot wwow wwtc wwtw wwwc wwww wwwy wwyc wwyo wwyy wybb wybc wybt wyby wycb wycc wyco wyct wycw wycy wyoo wyot wyow wyoy wytt wywy wyyc wyyy yccc yctc yobo yoot yoow yott yowt yoyo yyyy