ricer ircer rcier crier icrer cirer riecr irecr reicr ericr iercr eircr rceir creir recir ercir cerir ecrir icerr cierr iecrr eicrr ceirr ecirr ricre ircre rcire crire icrre cirre rirce irrce rrice rrice irrce rirce rcrie crrie rrcie rrcie crrie rcrie icrre cirre ircre ricre crire rcire rierc irerc reirc erirc ierrc eirrc rirec irrec rriec rriec irrec rirec reric erric rreic rreic erric reric ierrc eirrc irerc rierc erirc reirc rceri creri recri ercri cerri ecrri rcrei crrei rrcei rrcei crrei rcrei rerci errci rreci rreci errci rerci cerri ecrri creri rceri ercri recri icerr cierr iecrr eicrr ceirr ecirr icrer cirer ircer ricer crier rcier iercr eircr irecr riecr ericr reicr cerir ecrir creir rceir ercir recir
Note: these 'words' (valid or invalid) are all the permutations of the word ricer. These words are obtained by scrambling the letters in ricer.