(Ground strokes) can be hard.Logical formLearned from21 sentences. A president may take a hard line.Logical formLearned from21 sentences. Life can be at hard labor.Logical formLearned from21 sentences. A method can be hard.Logical formLearned from21 sentences. An artist can be hard.Logical formLearned from21 sentences. Crusts can be hard.Logical formLearned from21 sentences. Crackers can be hard.Logical formLearned from21 sentences. A practice can be hard.Logical formLearned from21 sentences. A clipping can be hard.Logical formLearned from21 sentences. A need can be for hard currency.Logical formLearned from21 sentences. Tabs can be hard.Logical formLearned from21 sentences. An approach can be hard.Logical formLearned from21 sentences. A hard drive may crash.Logical formLearned from21 sentences. A hard copy may pertain-to a magazine.Logical formLearned from21 sentences. Statistics can be hard.Logical formLearned from21 sentences.