coirs ocirs ciors icors oicrs iocrs coris ocris crois rcois orcis rocis ciros icros crios rcios ircos ricos oircs iorcs orics roics irocs riocs coisr ocisr ciosr icosr oicsr iocsr cosir ocsir csoir scoir oscir socir cisor icsor csior scior iscor sicor oiscr ioscr osicr soicr isocr siocr corsi ocrsi crosi rcosi orcsi rocsi cosri ocsri csori scori oscri socri crsoi rcsoi csroi scroi rscoi srcoi orsci rosci osrci sorci rsoci sroci cirso icrso criso rciso ircso ricso cisro icsro csiro sciro iscro sicro crsio rcsio csrio scrio rscio srcio irsco risco isrco sirco rsico srico oirsc iorsc orisc roisc irosc riosc oisrc iosrc osirc soirc isorc siorc orsic rosic osric soric rsoic sroic irsoc risoc isroc siroc rsioc srioc
Note: these 'words' (valid or invalid) are all the permutations of the word coirs. These words are obtained by scrambling the letters in coirs.