bbbb bblb bboy bbyo bffl bftt blbt blob bloo blot bloy bly- bobb bobo boby boff boll bolo bolt boly boob boof bool boot botb boto bott boty boyf boyl boyo btob bttb bylt byob byol ffff fftf flob floo flot floy flyt fobt fofo foll folo folt foly foof fool foot foto fott foty foyl foyt ft-l ftfy ftlb llll lloo lob- lobb lobo loby loff loft loll lolo loly loob loof lool loot lotl loto lott ltbf ltbl lyff lyft lyfy lyly lyo- lyot lyto lytt lyyf obbo obby obol obot oboy off- offo offy olbo olby ollo olly olof olot olyf ooby ooff oofy oolo oooo ootb ooty oto- otof otoo otoy otto oyly tbyf tfot to-y tobo tobt toby toff tofo toft tol- toll tolo tolt toly toof tool toot toto tott toty toyb toyl toyo toyt ttbb ttff ttoy tttt ttyl tybo tyff tyft tyl- tyll tylo tyto tytt tyty yobo yoff yoll yolo yoly yoof yool yoot yott yoyo yyff yyyy