Travels can be strenuous.Logical formLearned from2 sentences. A (toilet training) can be strenuous.Logical formLearned from2 sentences. Obstacles can be strenuous.Logical formLearned from2 sentences. A (summit trail) can be strenuous.Logical formLearned from2 sentences. Periods can be strenuous.Logical formLearned from2 sentences. Supporters can be strenuous.Logical formLearned from2 sentences. (Law enforcement efforts) can be strenuous.Logical formLearned from2 sentences. (Security requirements) can be strenuous.Logical formLearned from2 sentences. A function can be strenuous.Logical formLearned from2 sentences. Assignments can be strenuous.Logical formLearned from2 sentences. A climate can be strenuous.Logical formLearned from2 sentences. A (review process) can be strenuous.Logical formLearned from2 sentences. An observance can be strenuous.Logical formLearned from2 sentences. Means can be strenuous.Logical formLearned from2 sentences. An ordeal can be strenuous.Logical formLearned from2 sentences.