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