feats efats faets afets eafts aefts fetas eftas fteas tfeas etfas tefas fates aftes ftaes tfaes atfes tafes eatfs aetfs etafs teafs atefs taefs feast efast faest afest eafst aefst fesat efsat fseat sfeat esfat sefat faset afset fsaet sfaet asfet safet easft aesft esaft seaft aseft saeft fetsa eftsa ftesa tfesa etfsa tefsa festa efsta fseta sfeta esfta sefta ftsea tfsea fstea sftea tsfea stfea etsfa tesfa estfa setfa tsefa stefa fatse aftse ftase tfase atfse tafse faste afste fsate sfate asfte safte ftsae tfsae fstae sftae tsfae stfae atsfe tasfe astfe satfe tsafe stafe eatsf aetsf etasf teasf atesf taesf eastf aestf esatf seatf asetf saetf etsaf tesaf estaf setaf tseaf steaf atsef tasef astef satef tsaef staef
Note: these 'words' (valid or invalid) are all the permutations of the word feats. These words are obtained by scrambling the letters in feats.