bbbb bbeb bblb bebb bebe bebo beeb beef beel befe beff befo bele bell belo beo- beof bffl bleb blee bleo blob bloo bobb bobe bobo boee boef boel boeo bofe boff bole boll bolo boob booe boof bool ebbo ebel eboe ebol eboo eeee eefe eefl eele efeo el-b elbe elbo elee elef eleo elfe elle ello eole eolo fble febo feeb feel fefe feff fefo fele felf fell felo feof ffee ffff flee flob floe floo fofo fole foll folo foof fool lebo leef leel lefe leff lele lell lelo leof llef llll lloo lob- lobb lobe lobo loeb lofe loff lole loll lolo loob looe loof lool o-eo obbo obel oble oboe obol oele off- offe offo olbo ole- olef oleo olfe olle ollo olof oobe ooff oolo oooo