A back can be stiff.Logical formLearned from519 sentences. Competition can be stiff.Logical formLearned from426 sentences. Sanctions can be stiff.Logical formLearned from390 sentences. Sentences can be stiff.Logical formLearned from370 sentences. Winds can be stiff.Logical formLearned from350 sentences. Challenges can be stiff.Logical formLearned from350 sentences. A test can be stiff.Logical formLearned from336 sentences. Joints can be stiff.Logical formLearned from328 sentences. A criticism can be stiff.Logical formLearned from316 sentences. A sentence can be stiff.Logical formLearned from307 sentences. A female can be stiff.Logical formLearned from297 sentences. A shoulder can be stiff.Logical formLearned from285 sentences. A body can be stiff.Logical formLearned from270 sentences. Fingers can be stiff.Logical formLearned from255 sentences. A price can be stiff.Logical formLearned from255 sentences.