bbbb bbeb bblb bebb bebe beeb beef beel befe beff bele bell belu bffl bleb blee bleu blub blue bluf bubb bube bubu buel bueu bufe buff bulb bule bull bulu ebel ebul eeee eefe eefl eele el-b elbe elbu elee elef elfe elle ellu elue elul eule fble feeb feel fefe feff fele felf fell ffee ffff flee flub flue fluf fubb fubu fuel fuff fufu fule full fulu le-u lebu leef leel lefe leff lele lell lelu llef lleu llll lube luef lufe luff lufu lule lull lulu ubbe uble uele uell ufel uffe uleb ulee ulfe ulle ulul uulu uuuu