duhkha udhkha dhukha hdukha uhdkha hudkha dukhha udkhha dkuhha kduhha ukdhha kudhha dhkuha hdkuha dkhuha kdhuha hkduha khduha uhkdha hukdha ukhdha kuhdha hkudha khudha duhhka udhhka dhuhka hduhka uhdhka hudhka duhhka udhhka dhuhka hduhka uhdhka hudhka dhhuka hdhuka dhhuka hdhuka hhduka hhduka uhhdka huhdka uhhdka huhdka hhudka hhudka dukhha udkhha dkuhha kduhha ukdhha kudhha duhkha udhkha dhukha hdukha uhdkha hudkha dkhuha kdhuha dhkuha hdkuha khduha hkduha ukhdha kuhdha uhkdha hukdha khudha hkudha dhkhua hdkhua dkhhua kdhhua hkdhua khdhua dhhkua hdhkua dhhkua hdhkua hhdkua hhdkua dkhhua kdhhua dhkhua hdkhua khdhua hkdhua hkhdua khhdua hhkdua hhkdua khhdua hkhdua uhkhda hukhda ukhhda kuhhda hkuhda khuhda uhhkda huhkda uhhkda huhkda hhukda hhukda ukhhda kuhhda uhkhda hukhda khuhda hkuhda hkhuda khhuda hhkuda hhkuda khhuda hkhuda duhkah udhkah dhukah hdukah uhdkah hudkah dukhah udkhah dkuhah kduhah ukdhah kudhah dhkuah hdkuah dkhuah kdhuah hkduah khduah uhkdah hukdah ukhdah kuhdah hkudah khudah duhakh udhakh dhuakh hduakh uhdakh hudakh duahkh udahkh dauhkh aduhkh uadhkh audhkh dhaukh hdaukh dahukh adhukh hadukh ahdukh uhadkh huadkh uahdkh auhdkh haudkh ahudkh dukahh udkahh dkuahh kduahh ukdahh kudahh duakhh udakhh daukhh adukhh uadkhh audkhh dkauhh kdauhh dakuhh adkuhh kaduhh akduhh ukadhh kuadhh uakdhh aukdhh kaudhh akudhh dhkauh hdkauh dkhauh kdhauh hkdauh khdauh dhakuh hdakuh dahkuh adhkuh hadkuh ahdkuh dkahuh kdahuh dakhuh adkhuh kadhuh akdhuh hkaduh khaduh hakduh ahkduh kahduh akhduh uhkadh hukadh ukhadh kuhadh hkuadh khuadh uhakdh huakdh uahkdh auhkdh haukdh ahukdh ukahdh kuahdh uakhdh aukhdh kauhdh akuhdh hkaudh khaudh hakudh ahkudh kahudh akhudh duhhak udhhak dhuhak hduhak uhdhak hudhak duhhak udhhak dhuhak hduhak uhdhak hudhak dhhuak hdhuak dhhuak hdhuak hhduak hhduak uhhdak huhdak uhhdak huhdak hhudak hhudak duhahk udhahk dhuahk hduahk uhdahk hudahk duahhk udahhk dauhhk aduhhk uadhhk audhhk dhauhk hdauhk dahuhk adhuhk haduhk ahduhk uhadhk huadhk uahdhk auhdhk haudhk ahudhk duhahk udhahk dhuahk hduahk uhdahk hudahk duahhk udahhk dauhhk aduhhk uadhhk audhhk dhauhk hdauhk dahuhk adhuhk haduhk ahduhk uhadhk huadhk uahdhk auhdhk haudhk ahudhk dhhauk hdhauk dhhauk hdhauk hhdauk hhdauk dhahuk hdahuk dahhuk adhhuk hadhuk ahdhuk dhahuk hdahuk dahhuk adhhuk hadhuk ahdhuk hhaduk hhaduk hahduk ahhduk hahduk ahhduk uhhadk huhadk uhhadk huhadk hhuadk hhuadk uhahdk huahdk uahhdk auhhdk hauhdk ahuhdk uhahdk huahdk uahhdk auhhdk hauhdk ahuhdk hhaudk hhaudk hahudk ahhudk hahudk ahhudk dukhah udkhah dkuhah kduhah ukdhah kudhah duhkah udhkah dhukah hdukah uhdkah hudkah dkhuah kdhuah dhkuah hdkuah khduah hkduah ukhdah kuhdah uhkdah hukdah khudah hkudah dukahh udkahh dkuahh kduahh ukdahh kudahh duakhh udakhh daukhh adukhh uadkhh audkhh dkauhh kdauhh dakuhh adkuhh kaduhh akduhh ukadhh kuadhh uakdhh aukdhh kaudhh akudhh duhakh udhakh dhuakh hduakh uhdakh hudakh duahkh udahkh dauhkh aduhkh uadhkh audhkh dhaukh hdaukh dahukh adhukh hadukh ahdukh uhadkh huadkh uahdkh auhdkh haudkh ahudkh dkhauh kdhauh dhkauh hdkauh khdauh hkdauh dkahuh kdahuh dakhuh adkhuh kadhuh akdhuh dhakuh hdakuh dahkuh adhkuh hadkuh ahdkuh khaduh hkaduh kahduh akhduh hakduh ahkduh ukhadh kuhadh uhkadh hukadh khuadh hkuadh ukahdh kuahdh uakhdh aukhdh kauhdh akuhdh uhakdh huakdh uahkdh auhkdh haukdh ahukdh khaudh hkaudh kahudh akhudh hakudh ahkudh dhkhau hdkhau dkhhau kdhhau hkdhau khdhau dhhkau hdhkau dhhkau hdhkau hhdkau hhdkau dkhhau kdhhau dhkhau hdkhau khdhau hkdhau hkhdau khhdau hhkdau hhkdau khhdau hkhdau dhkahu hdkahu dkhahu kdhahu hkdahu khdahu dhakhu hdakhu dahkhu adhkhu hadkhu ahdkhu dkahhu kdahhu dakhhu adkhhu kadhhu akdhhu hkadhu khadhu hakdhu ahkdhu kahdhu akhdhu dhhaku hdhaku dhhaku hdhaku hhdaku hhdaku dhahku hdahku dahhku adhhku hadhku ahdhku dhahku hdahku dahhku adhhku hadhku ahdhku hhadku hhadku hahdku ahhdku hahdku ahhdku dkhahu kdhahu dhkahu hdkahu khdahu hkdahu dkahhu kdahhu dakhhu adkhhu kadhhu akdhhu dhakhu hdakhu dahkhu adhkhu hadkhu ahdkhu khadhu hkadhu kahdhu akhdhu hakdhu ahkdhu hkhadu khhadu hhkadu hhkadu khhadu hkhadu hkahdu khahdu hakhdu ahkhdu kahhdu akhhdu hhakdu hhakdu hahkdu ahhkdu hahkdu ahhkdu khahdu hkahdu kahhdu akhhdu hakhdu ahkhdu uhkhad hukhad ukhhad kuhhad hkuhad khuhad uhhkad huhkad uhhkad huhkad hhukad hhukad ukhhad kuhhad uhkhad hukhad khuhad hkuhad hkhuad khhuad hhkuad hhkuad khhuad hkhuad uhkahd hukahd ukhahd kuhahd hkuahd khuahd uhakhd huakhd uahkhd auhkhd haukhd ahukhd ukahhd kuahhd uakhhd aukhhd kauhhd akuhhd hkauhd khauhd hakuhd ahkuhd kahuhd akhuhd uhhakd huhakd uhhakd huhakd hhuakd hhuakd uhahkd huahkd uahhkd auhhkd hauhkd ahuhkd uhahkd huahkd uahhkd auhhkd hauhkd ahuhkd hhaukd hhaukd hahukd ahhukd hahukd ahhukd ukhahd kuhahd uhkahd hukahd khuahd hkuahd ukahhd kuahhd uakhhd aukhhd kauhhd akuhhd uhakhd huakhd uahkhd auhkhd haukhd ahukhd khauhd hkauhd kahuhd akhuhd hakuhd ahkuhd hkhaud khhaud hhkaud hhkaud khhaud hkhaud hkahud khahud hakhud ahkhud kahhud akhhud hhakud hhakud hahkud ahhkud hahkud ahhkud khahud hkahud kahhud akhhud hakhud ahkhud
Note: these 'words' (valid or invalid) are all the permutations of the word duhkha. These words are obtained by scrambling the letters in duhkha.