bbbb bbeb bblb bbox bebb bebe bebo beeb beel bele bell belo belu beo- beux bleb blee bleo bleu blob bloo blou blub blue bobb bobe bobo bobu boee boel boeo bole boll bolo bolu boob booe bool boox boue boul bubb bube bubo bubu buel bueu bulb bule bull bulu buol ebbo ebel eboe ebol eboo ebox ebul eeee eele el-b elbe elbo elbu elee eleo elex elle ello ellu elue elul eole eolo eoux eule exel exo- exul le-u lebo lebu leel lele lell lelo lelu leou leox lexx lleu llll lloo lob- lobb lobe lobo loeb loeu lole loll lolo loob looe lool loue loul louu loux lox- loxo lube lule lull lulu luxe luxo lxxx o-eo obbo obel obex oble oblu oboe obol obox oele olbo ole- oleo olle ollo olux oobe oolo oooo oule oulu oulx ouu- oxo- oxox oxxo ubbe ubbo uble ublo uele uell uleb ulee uleo ulex ulle ullo ulo- ulul uulu uuuu uxue uxul xbee xbel xbox xexe xlox xolo xoxo xuxu xxxo xxxx