ncirs cnirs nicrs incrs cinrs icnrs ncris cnris nrcis rncis crnis rcnis nircs inrcs nrics rnics irncs rincs cirns icrns crins rcins ircns ricns ncisr cnisr nicsr incsr cinsr icnsr ncsir cnsir nscir sncir csnir scnir niscr inscr nsicr snicr isncr sincr cisnr icsnr csinr scinr iscnr sicnr ncrsi cnrsi nrcsi rncsi crnsi rcnsi ncsri cnsri nscri sncri csnri scnri nrsci rnsci nsrci snrci rsnci srnci crsni rcsni csrni scrni rscni srcni nirsc inrsc nrisc rnisc irnsc rinsc nisrc insrc nsirc snirc isnrc sinrc nrsic rnsic nsric snric rsnic srnic irsnc risnc isrnc sirnc rsinc srinc cirsn icrsn crisn rcisn ircsn ricsn cisrn icsrn csirn scirn iscrn sicrn crsin rcsin csrin scrin rscin srcin irscn riscn isrcn sircn rsicn sricn
Note: these 'words' (valid or invalid) are all the permutations of the word ncirs. These words are obtained by scrambling the letters in ncirs.