renga ernga rnega nrega enrga nerga regna ergna rgena grena egrna gerna rngea nrgea rgnea grnea ngrea gnrea engra negra egnra genra ngera gnera renag ernag rneag nreag enrag nerag reang erang raeng areng earng aerng rnaeg nraeg raneg arneg nareg anreg enarg nearg eanrg aenrg naerg anerg regan ergan rgean grean egran geran reagn eragn raegn aregn eargn aergn rgaen graen ragen argen garen agren egarn gearn eagrn aegrn gaern agern rngae nrgae rgnae grnae ngrae gnrae rnage nrage range arnge narge anrge rgane grane ragne argne garne agrne ngare gnare nagre angre ganre agnre engar negar egnar genar ngear gnear enagr neagr eangr aengr naegr anegr eganr geanr eagnr aegnr gaenr agenr ngaer gnaer nager anger ganer agner
Note: these 'words' (valid or invalid) are all the permutations of the word renga. These words are obtained by scrambling the letters in renga.