A ruling can be rigid.Logical formLearned from4 sentences. An (education system) can be rigid.Logical formLearned from4 sentences. A railing can be rigid.Logical formLearned from4 sentences. A person can be rigid.Logical formLearned from4 sentences. An approximation can be rigid.Logical formLearned from4 sentences. A reporting can be rigid.Logical formLearned from4 sentences. A custom can be rigid.Logical formLearned from4 sentences. A handle can be rigid.Logical formLearned from4 sentences. (Eligibility rules) can be rigid.Logical formLearned from4 sentences. A sail can be rigid.Logical formLearned from4 sentences. (Operating methods) can be rigid.Logical formLearned from4 sentences. A nationalism can be rigid.Logical formLearned from4 sentences. Ribs can be rigid.Logical formLearned from4 sentences. A footing can be rigid.Logical formLearned from4 sentences. Rows can be rigid.Logical formLearned from4 sentences.