rehla erhla rhela hrela ehrla herla relha erlha rleha lreha elrha lerha rhlea hrlea rlhea lrhea hlrea lhrea ehlra helra elhra lehra hlera lhera rehal erhal rheal hreal ehral heral reahl erahl raehl arehl earhl aerhl rhael hrael rahel arhel harel ahrel eharl hearl eahrl aehrl haerl aherl relah erlah rleah lreah elrah lerah realh eralh raelh arelh earlh aerlh rlaeh lraeh raleh arleh lareh alreh elarh learh ealrh aelrh laerh alerh rhlae hrlae rlhae lrhae hlrae lhrae rhale hrale rahle arhle harle ahrle rlahe lrahe ralhe arlhe larhe alrhe hlare lhare halre ahlre lahre alhre ehlar helar elhar lehar hlear lhear ehalr healr eahlr aehlr haelr ahelr elahr leahr ealhr aelhr laehr alehr hlaer lhaer haler ahler laher alher
Note: these 'words' (valid or invalid) are all the permutations of the word rehla. These words are obtained by scrambling the letters in rehla.