riged irged rgied gried igred gired riegd iregd reigd erigd iergd eirgd rgeid greid regid ergid gerid egrid igerd gierd iegrd eigrd geird egird rigde irgde rgide gride igrde girde ridge irdge rdige drige idrge dirge rgdie grdie rdgie drgie gdrie dgrie igdre gidre idgre digre gdire dgire riedg iredg reidg eridg ierdg eirdg rideg irdeg rdieg drieg idreg direg redig erdig rdeig dreig edrig derig iedrg eidrg iderg dierg edirg deirg rgedi gredi regdi ergdi gerdi egrdi rgdei grdei rdgei drgei gdrei dgrei redgi erdgi rdegi dregi edrgi dergi gedri egdri gderi dgeri edgri degri igedr giedr iegdr eigdr geidr egidr igder gider idger diger gdier dgier iedgr eidgr idegr diegr edigr deigr gedir egdir gdeir dgeir edgir degir
Note: these 'words' (valid or invalid) are all the permutations of the word riged. These words are obtained by scrambling the letters in riged.