niding inding ndiing dniing idning dining niidng inidng niidng inidng iindng iindng ndiing dniing niding inding dining idning idinng diinng iidnng iidnng diinng idinng nidnig indnig ndinig dninig idnnig dinnig nindig inndig nnidig nnidig inndig nindig ndniig dnniig nndiig nndiig dnniig ndniig idnnig dinnig indnig nidnig dninig ndinig niindg inindg niindg inindg iinndg iinndg ninidg innidg nniidg nniidg innidg ninidg ninidg innidg nniidg nniidg innidg ninidg iinndg iinndg inindg niindg inindg niindg ndinig dninig nidnig indnig dinnig idnnig ndniig dnniig nndiig nndiig dnniig ndniig nindig inndig nnidig nnidig inndig nindig dinnig idnnig dninig ndinig indnig nidnig idinng diinng iidnng iidnng diinng idinng idning dining inding niding dniing ndiing iindng iindng inidng niidng inidng niidng dining idning dniing ndiing inding niding nidign indign ndiign dniign idnign dinign niidgn inidgn niidgn inidgn iindgn iindgn ndiign dniign nidign indign dinign idnign idingn diingn iidngn iidngn diingn idingn nidgin indgin ndigin dnigin idngin dingin nigdin ingdin ngidin gnidin igndin gindin ndgiin dngiin ngdiin gndiin dgniin gdniin idgnin dignin igdnin gidnin dginin gdinin niigdn inigdn niigdn inigdn iingdn iingdn nigidn ingidn ngiidn gniidn ignidn ginidn nigidn ingidn ngiidn gniidn ignidn ginidn iigndn iigndn igindn giindn igindn giindn ndigin dnigin nidgin indgin dingin idngin ndgiin dngiin ngdiin gndiin dgniin gdniin nigdin ingdin ngidin gnidin igndin gindin dignin idgnin dginin gdinin igdnin gidnin idignn diignn iidgnn iidgnn diignn idignn idginn diginn igdinn gidinn dgiinn gdiinn iigdnn iigdnn igidnn giidnn igidnn giidnn diginn idginn dgiinn gdiinn igdinn gidinn nidngi indngi ndingi dningi idnngi dinngi nindgi inndgi nnidgi nnidgi inndgi nindgi ndnigi dnnigi nndigi nndigi dnnigi ndnigi idnngi dinngi indngi nidngi dningi ndingi nidgni indgni ndigni dnigni idngni dingni nigdni ingdni ngidni gnidni igndni gindni ndgini dngini ngdini gndini dgnini gdnini idgnni dignni igdnni gidnni dginni gdinni ningdi inngdi nnigdi nnigdi inngdi ningdi nigndi ingndi ngindi gnindi ignndi ginndi nngidi nngidi ngnidi gnnidi ngnidi gnnidi ingndi nigndi ignndi ginndi ngindi gnindi ndngii dnngii nndgii nndgii dnngii ndngii ndgnii dngnii ngdnii gndnii dgnnii gdnnii nngdii nngdii ngndii gnndii ngndii gnndii dngnii ndgnii dgnnii gdnnii ngdnii gndnii idngni dingni indgni nidgni dnigni ndigni idgnni dignni igdnni gidnni dginni gdinni ingdni nigdni igndni gindni ngidni gnidni dngini ndgini dgnini gdnini ngdini gndini niingd iningd niingd iningd iinngd iinngd ninigd innigd nniigd nniigd innigd ninigd ninigd innigd nniigd nniigd innigd ninigd iinngd iinngd iningd niingd iningd niingd niignd inignd niignd inignd iingnd iingnd nigind ingind ngiind gniind ignind ginind nigind ingind ngiind gniind ignind ginind iignnd iignnd iginnd giinnd iginnd giinnd ningid inngid nnigid nnigid inngid ningid nignid ingnid nginid gninid ignnid ginnid nngiid nngiid ngniid gnniid ngniid gnniid ingnid nignid ignnid ginnid nginid gninid ningid inngid nnigid nnigid inngid ningid nignid ingnid nginid gninid ignnid ginnid nngiid nngiid ngniid gnniid ngniid gnniid ingnid nignid ignnid ginnid nginid gninid iingnd iingnd inignd niignd inignd niignd iignnd iignnd iginnd giinnd iginnd giinnd ingind nigind ignind ginind ngiind gniind ingind nigind ignind ginind ngiind gniind ndingi dningi nidngi indngi dinngi idnngi ndnigi dnnigi nndigi nndigi dnnigi ndnigi nindgi inndgi nnidgi nnidgi inndgi nindgi dinngi idnngi dningi ndingi indngi nidngi ndigni dnigni nidgni indgni dingni idngni ndgini dngini ngdini gndini dgnini gdnini nigdni ingdni ngidni gnidni igndni gindni dignni idgnni dginni gdinni igdnni gidnni ndngii dnngii nndgii nndgii dnngii ndngii ndgnii dngnii ngdnii gndnii dgnnii gdnnii nngdii nngdii ngndii gnndii ngndii gnndii dngnii ndgnii dgnnii gdnnii ngdnii gndnii ningdi inngdi nnigdi nnigdi inngdi ningdi nigndi ingndi ngindi gnindi ignndi ginndi nngidi nngidi ngnidi gnnidi ngnidi gnnidi ingndi nigndi ignndi ginndi ngindi gnindi dingni idngni dnigni ndigni indgni nidgni dignni idgnni dginni gdinni igdnni gidnni dngini ndgini dgnini gdnini ngdini gndini ingdni nigdni igndni gindni ngidni gnidni idingn diingn iidngn iidngn diingn idingn idnign dinign indign nidign dniign ndiign iindgn iindgn inidgn niidgn inidgn niidgn dinign idnign dniign ndiign indign nidign idignn diignn iidgnn iidgnn diignn idignn idginn diginn igdinn gidinn dgiinn gdiinn iigdnn iigdnn igidnn giidnn igidnn giidnn diginn idginn dgiinn gdiinn igdinn gidinn idngin dingin indgin nidgin dnigin ndigin idgnin dignin igdnin gidnin dginin gdinin ingdin nigdin igndin gindin ngidin gnidin dngiin ndgiin dgniin gdniin ngdiin gndiin iingdn iingdn inigdn niigdn inigdn niigdn iigndn iigndn igindn giindn igindn giindn ingidn nigidn ignidn ginidn ngiidn gniidn ingidn nigidn ignidn ginidn ngiidn gniidn dingin idngin dnigin ndigin indgin nidgin dignin idgnin dginin gdinin igdnin gidnin dngiin ndgiin dgniin gdniin ngdiin gndiin ingdin nigdin igndin gindin ngidin gnidin
Note: these 'words' (valid or invalid) are all the permutations of the word niding. These words are obtained by scrambling the letters in niding.