couch ocuch cuoch ucoch oucch uocch cocuh occuh ccouh ccouh occuh cocuh cucoh uccoh ccuoh ccuoh uccoh cucoh oucch uocch ocuch couch ucoch cuoch couhc ocuhc cuohc ucohc ouchc uochc cohuc ochuc chouc hcouc ohcuc hocuc cuhoc uchoc chuoc hcuoc uhcoc hucoc ouhcc uohcc ohucc houcc uhocc huocc cochu occhu ccohu ccohu occhu cochu cohcu ochcu chocu hcocu ohccu hoccu cchou cchou chcou hccou chcou hccou ochcu cohcu ohccu hoccu chocu hcocu cucho uccho ccuho ccuho uccho cucho cuhco uchco chuco hcuco uhcco hucco cchuo cchuo chcuo hccuo chcuo hccuo uchco cuhco uhcco hucco chuco hcuco ouchc uochc ocuhc couhc ucohc cuohc ouhcc uohcc ohucc houcc uhocc huocc ochuc cohuc ohcuc hocuc chouc hcouc uchoc cuhoc uhcoc hucoc chuoc hcuoc
Note: these 'words' (valid or invalid) are all the permutations of the word couch. These words are obtained by scrambling the letters in couch.