Plastics can be tough.Logical formLearned from13 sentences. A capsule can be tough.Logical formLearned from13 sentences. Markings can be tough.Logical formLearned from13 sentences. A rest can be tough.Logical formLearned from13 sentences. (Austerity programs) can be tough.Logical formLearned from13 sentences. (Warning labels) can be tough.Logical formLearned from13 sentences. Rugby can be tough.Logical formLearned from13 sentences. (Pay talks) can be tough.Logical formLearned from13 sentences. A stage can be tough.Logical formLearned from13 sentences. An electoral campaign can be tough.Logical formLearned from13 sentences. A (border town) can be tough.Logical formLearned from13 sentences. A pad can be tough.Logical formLearned from13 sentences. (Security precautions) can be tough.Logical formLearned from13 sentences. (Graduation requirements) can be tough.Logical formLearned from13 sentences. A ruler can be tough.Logical formLearned from13 sentences.