apoid paoid aopid oapid poaid opaid apiod paiod aipod iapod piaod ipaod aoipd oaipd aiopd iaopd oiapd ioapd poiad opiad pioad ipoad oipad iopad apodi paodi aopdi oapdi poadi opadi apdoi padoi adpoi dapoi pdaoi dpaoi aodpi oadpi adopi daopi odapi doapi podai opdai pdoai dpoai odpai dopai apido paido aipdo iapdo piado ipado apdio padio adpio dapio pdaio dpaio aidpo iadpo adipo daipo idapo diapo pidao ipdao pdiao dpiao idpao dipao aoidp oaidp aiodp iaodp oiadp ioadp aodip oadip adoip daoip odaip doaip aidop iadop adiop daiop idaop diaop oidap iodap odiap doiap idoap dioap poida opida pioda ipoda oipda iopda podia opdia pdoia dpoia odpia dopia pidoa ipdoa pdioa dpioa idpoa dipoa oidpa iodpa odipa doipa idopa diopa
Note: these 'words' (valid or invalid) are all the permutations of the word apoid. These words are obtained by scrambling the letters in apoid.