piped ipped ppied ppied ipped piped piepd ipepd peipd epipd ieppd eippd ppeid ppeid pepid eppid pepid eppid ipepd piepd ieppd eippd peipd epipd pipde ippde ppide ppide ippde pipde pidpe ipdpe pdipe dpipe idppe dippe ppdie ppdie pdpie dppie pdpie dppie ipdpe pidpe idppe dippe pdipe dpipe piedp ipedp peidp epidp iepdp eipdp pidep ipdep pdiep dpiep idpep dipep pedip epdip pdeip dpeip edpip depip iedpp eidpp idepp diepp edipp deipp ppedi ppedi pepdi eppdi pepdi eppdi ppdei ppdei pdpei dppei pdpei dppei pedpi epdpi pdepi dpepi edppi deppi pedpi epdpi pdepi dpepi edppi deppi ipedp piedp iepdp eipdp peidp epidp ipdep pidep idpep dipep pdiep dpiep iedpp eidpp idepp diepp edipp deipp pedip epdip pdeip dpeip edpip depip
Note: these 'words' (valid or invalid) are all the permutations of the word piped. These words are obtained by scrambling the letters in piped.