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