recta ercta rceta creta ecrta certa retca ertca rteca treca etrca terca rctea crtea rtcea trcea ctrea tcrea ectra cetra etcra tecra ctera tcera recat ercat rceat creat ecrat cerat react eract raect arect earct aerct rcaet craet racet arcet caret acret ecart ceart eacrt aecrt caert acert retac ertac rteac treac etrac terac reatc eratc raetc aretc eartc aertc rtaec traec ratec artec tarec atrec etarc tearc eatrc aetrc taerc aterc rctae crtae rtcae trcae ctrae tcrae rcate crate racte arcte carte acrte rtace trace ratce artce tarce atrce ctare tcare catre actre tacre atcre ectar cetar etcar tecar ctear tcear ecatr ceatr eactr aectr caetr acetr etacr teacr eatcr aetcr taecr atecr ctaer tcaer cater acter tacer atcer
Note: these 'words' (valid or invalid) are all the permutations of the word recta. These words are obtained by scrambling the letters in recta.