madid amdid mdaid dmaid admid damid maidd amidd miadd imadd aimdd iamdd mdiad dmiad midad imdad dimad idmad adimd daimd aidmd iadmd diamd idamd maddi amddi mdadi dmadi admdi damdi maddi amddi mdadi dmadi admdi damdi mddai dmdai mddai dmdai ddmai ddmai addmi dadmi addmi dadmi ddami ddami maidd amidd miadd imadd aimdd iamdd madid amdid mdaid dmaid admid damid midad imdad mdiad dmiad idmad dimad aidmd iadmd adimd daimd idamd diamd mdida dmida midda imdda dimda idmda mddia dmdia mddia dmdia ddmia ddmia midda imdda mdida dmida idmda dimda didma iddma ddima ddima iddma didma adidm daidm aiddm iaddm diadm idadm addim dadim addim dadim ddaim ddaim aiddm iaddm adidm daidm idadm diadm didam iddam ddiam ddiam iddam didam
Note: these 'words' (valid or invalid) are all the permutations of the word madid. These words are obtained by scrambling the letters in madid.