wafer awfer wfaer fwaer afwer fawer waefr awefr weafr ewafr aewfr eawfr wfear fwear wefar ewfar fewar efwar afewr faewr aefwr eafwr feawr efawr wafre awfre wfare fware afwre fawre warfe awrfe wrafe rwafe arwfe rawfe wfrae fwrae wrfae rwfae frwae rfwae afrwe farwe arfwe rafwe frawe rfawe waerf awerf wearf ewarf aewrf eawrf waref awref wraef rwaef arwef rawef weraf ewraf wreaf rweaf erwaf rewaf aerwf earwf arewf raewf erawf reawf wfera fwera wefra ewfra fewra efwra wfrea fwrea wrfea rwfea frwea rfwea werfa ewrfa wrefa rwefa erwfa rewfa ferwa efrwa frewa rfewa erfwa refwa aferw faerw aefrw eafrw fearw efarw afrew farew arfew rafew fraew rfaew aerfw earfw arefw raefw erafw reafw feraw efraw freaw rfeaw erfaw refaw
Note: these 'words' (valid or invalid) are all the permutations of the word wafer. These words are obtained by scrambling the letters in wafer.