prrsi rprsi prrsi rprsi rrpsi rrpsi prsri rpsri psrri sprri rspri srpri prsri rpsri psrri sprri rspri srpri rrspi rrspi rsrpi srrpi rsrpi srrpi prris rpris prris rpris rrpis rrpis prirs rpirs pirrs iprrs riprs irprs prirs rpirs pirrs iprrs riprs irprs rrips rrips rirps irrps rirps irrps prsir rpsir psrir sprir rspir srpir prisr rpisr pirsr iprsr ripsr irpsr psirr spirr pisrr ipsrr siprr isprr rsipr sripr rispr irspr sirpr isrpr prsir rpsir psrir sprir rspir srpir prisr rpisr pirsr iprsr ripsr irpsr psirr spirr pisrr ipsrr siprr isprr rsipr sripr rispr irspr sirpr isrpr rrsip rrsip rsrip srrip rsrip srrip rrisp rrisp rirsp irrsp rirsp irrsp rsirp srirp risrp irsrp sirrp isrrp rsirp srirp risrp irsrp sirrp isrrp
Note: these 'words' (valid or invalid) are all the permutations of the word prrsi. These words are obtained by scrambling the letters in prrsi.