retao ertao rteao treao etrao terao reato erato raeto areto earto aerto rtaeo traeo rateo arteo tareo atreo etaro tearo eatro aetro taero atero retoa ertoa rteoa treoa etroa teroa reota erota roeta oreta eorta oerta rtoea troea rotea ortea torea otrea etora teora eotra oetra toera otera reaot eraot raeot areot earot aerot reoat eroat roeat oreat eorat oerat raoet aroet roaet oraet aoret oaret eaort aeort eoart oeart aoert oaert rtaoe traoe ratoe artoe taroe atroe rtoae troae rotae ortae torae otrae raote arote roate orate aorte oarte taore atore toare otare aotre oatre etaor teaor eator aetor taeor ateor etoar teoar eotar oetar toear otear eaotr aeotr eoatr oeatr aoetr oaetr taoer atoer toaer otaer aoter oater
Note: these 'words' (valid or invalid) are all the permutations of the word retao. These words are obtained by scrambling the letters in retao.