tapid atpid tpaid ptaid aptid patid taipd atipd tiapd itapd aitpd iatpd tpiad ptiad tipad itpad pitad iptad apitd paitd aiptd iaptd piatd ipatd tapdi atpdi tpadi ptadi aptdi patdi tadpi atdpi tdapi dtapi adtpi datpi tpdai ptdai tdpai dtpai pdtai dptai apdti padti adpti dapti pdati dpati taidp atidp tiadp itadp aitdp iatdp tadip atdip tdaip dtaip adtip datip tidap itdap tdiap dtiap idtap ditap aidtp iadtp aditp daitp idatp diatp tpida ptida tipda itpda pitda iptda tpdia ptdia tdpia dtpia pdtia dptia tidpa itdpa tdipa dtipa idtpa ditpa pidta ipdta pdita dpita idpta dipta apidt paidt aipdt iapdt piadt ipadt apdit padit adpit dapit pdait dpait aidpt iadpt adipt daipt idapt diapt pidat ipdat pdiat dpiat idpat dipat
Note: these 'words' (valid or invalid) are all the permutations of the word tapid. These words are obtained by scrambling the letters in tapid.