A current can be stiff.Logical formLearned from26 sentences. A muscle can be stiff.Logical formLearned from26 sentences. A contest can be stiff.Logical formLearned from26 sentences. A glass can be stiff.Logical formLearned from25 sentences. A suit can be stiff.Logical formLearned from25 sentences. A heart can be stiff.Logical formLearned from25 sentences. Leaves can be stiff.Logical formLearned from25 sentences. A feel can be stiff.Logical formLearned from25 sentences. Limits can be stiff.Logical formLearned from25 sentences. An increase can be stiff.Logical formLearned from25 sentences. A penalty can be stiff.Logical formLearned from25 sentences. A white collar can be stiff.Logical formLearned from24 sentences. Stalks can be stiff.Logical formLearned from24 sentences. Shoes can be stiff.Logical formLearned from24 sentences. Knees can be stiff.Logical formLearned from24 sentences.