yauld ayuld yuald uyald auyld uayld yalud aylud ylaud lyaud alyud layud yulad uylad yluad lyuad ulyad luyad aulyd ualyd aluyd lauyd ulayd luayd yaudl ayudl yuadl uyadl auydl uaydl yadul aydul ydaul dyaul adyul dayul yudal uydal ydual dyual udyal duyal audyl uadyl aduyl dauyl udayl duayl yaldu ayldu yladu lyadu alydu laydu yadlu aydlu ydalu dyalu adylu daylu yldau lydau ydlau dylau ldyau dlyau aldyu ladyu adlyu dalyu ldayu dlayu yulda uylda yluda lyuda ulyda luyda yudla uydla ydula dyula udyla duyla yldua lydua ydlua dylua ldyua dlyua uldya ludya udlya dulya lduya dluya auldy ualdy aludy laudy ulady luady audly uadly aduly dauly udaly dualy alduy laduy adluy daluy ldauy dlauy ulday luday udlay dulay lduay dluay
Note: these 'words' (valid or invalid) are all the permutations of the word yauld. These words are obtained by scrambling the letters in yauld.