A barrier can be tough.Logical formLearned from31 sentences. Plans can be tough.Logical formLearned from31 sentences. A father can be tough.Logical formLearned from31 sentences. A talk can be tough.Logical formLearned from31 sentences. A female may hang tough.Logical formLearned from31 sentences. A band can be tough.Logical formLearned from31 sentences. Graders can be tough.Logical formLearned from31 sentences. A therapist can be tough.Logical formLearned from31 sentences. A terrain can be tough.Logical formLearned from31 sentences. An officer can be tough.Logical formLearned from31 sentences. A field can be tough.Logical formLearned from31 sentences. Kids can be tough.Logical formLearned from31 sentences. A campaign can be tough.Logical formLearned from31 sentences. A fiber can be tough.Logical formLearned from31 sentences. A wording can be tough.Logical formLearned from31 sentences.