plain lpain palin aplin lapin alpin plian lpian pilan iplan lipan ilpan pailn apiln pialn ipaln aipln iapln laipn alipn liapn ilapn ailpn ialpn plani lpani palni aplni lapni alpni plnai lpnai pnlai nplai lnpai nlpai panli apnli pnali npali anpli napli lanpi alnpi lnapi nlapi anlpi nalpi plina lpina pilna iplna lipna ilpna plnia lpnia pnlia nplia lnpia nlpia pinla ipnla pnila npila inpla nipla linpa ilnpa lnipa nlipa inlpa nilpa painl apinl pianl ipanl aipnl iapnl panil apnil pnail npail anpil napil pinal ipnal pnial npial inpal nipal ainpl ianpl anipl naipl inapl niapl lainp alinp lianp ilanp ailnp ialnp lanip alnip lnaip nlaip anlip nalip linap ilnap lniap nliap inlap nilap ainlp ianlp anilp nailp inalp nialp
Note: these 'words' (valid or invalid) are all the permutations of the word plain. These words are obtained by scrambling the letters in plain.