ratha artha rtaha traha atrha tarha rahta arhta rhata hrata ahrta harta rthaa trhaa rhtaa hrtaa thraa htraa athra tahra ahtra hatra thara htara ratah artah rtaah traah atrah tarah raath arath raath arath aarth aarth rtaah traah ratah artah tarah atrah atarh taarh aatrh aatrh taarh atarh rahat arhat rhaat hraat ahrat harat raaht araht raaht araht aarht aarht rhaat hraat rahat arhat harat ahrat ahart haart aahrt aahrt haart ahart rthaa trhaa rhtaa hrtaa thraa htraa rtaha traha ratha artha tarha atrha rhata hrata rahta arhta harta ahrta thara htara tahra athra hatra ahtra athar tahar ahtar hatar thaar htaar atahr taahr aathr aathr taahr atahr ahatr haatr aahtr aahtr haatr ahatr thaar htaar tahar athar hatar ahtar
Note: these 'words' (valid or invalid) are all the permutations of the word ratha. These words are obtained by scrambling the letters in ratha.