ripts irpts rpits prits iprts pirts ritps irtps rtips trips itrps tirps rptis prtis rtpis trpis ptris tpris iptrs pitrs itprs tiprs ptirs tpirs ripst irpst rpist prist iprst pirst rispt irspt rsipt sript isrpt sirpt rpsit prsit rspit srpit psrit sprit ipsrt pisrt isprt siprt psirt spirt ritsp irtsp rtisp trisp itrsp tirsp ristp irstp rsitp sritp isrtp sirtp rtsip trsip rstip srtip tsrip strip itsrp tisrp istrp sitrp tsirp stirp rptsi prtsi rtpsi trpsi ptrsi tprsi rpsti prsti rspti srpti psrti sprti rtspi trspi rstpi srtpi tsrpi strpi ptsri tpsri pstri sptri tspri stpri iptsr pitsr itpsr tipsr ptisr tpisr ipstr pistr isptr siptr psitr spitr itspr tispr istpr sitpr tsipr stipr ptsir tpsir pstir sptir tspir stpir
Note: these 'words' (valid or invalid) are all the permutations of the word ripts. These words are obtained by scrambling the letters in ripts.