nopal onpal npoal pnoal opnal ponal noapl onapl naopl anopl oanpl aonpl npaol pnaol napol anpol panol apnol opanl poanl oapnl aopnl paonl aponl nopla onpla npola pnola opnla ponla nolpa onlpa nlopa lnopa olnpa lonpa nploa pnloa nlpoa lnpoa plnoa lpnoa oplna polna olpna lopna plona lpona noalp onalp naolp anolp oanlp aonlp nolap onlap nloap lnoap olnap lonap nalop anlop nlaop lnaop alnop lanop oalnp aolnp olanp loanp alonp laonp npalo pnalo naplo anplo panlo apnlo nplao pnlao nlpao lnpao plnao lpnao nalpo anlpo nlapo lnapo alnpo lanpo palno aplno plano lpano alpno lapno opaln poaln oapln aopln paoln apoln oplan polan olpan lopan ploan lpoan oalpn aolpn olapn loapn alopn laopn palon aplon plaon lpaon alpon lapon
Note: these 'words' (valid or invalid) are all the permutations of the word nopal. These words are obtained by scrambling the letters in nopal.