A return can be arduous.Logical formLearned from7 sentences. An office can be arduous.Logical formLearned from7 sentences. A level can be arduous.Logical formLearned from7 sentences. A revolution can be arduous.Logical formLearned from7 sentences. Miles can be arduous.Logical formLearned from7 sentences. Commutes can be arduous.Logical formLearned from7 sentences. A surgery can be arduous.Logical formLearned from7 sentences. A case can be arduous.Logical formLearned from7 sentences. An assignment can be arduous.Logical formLearned from7 sentences. Services can be arduous.Logical formLearned from7 sentences. A siege can be arduous.Logical formLearned from7 sentences. (Production recovery) of a region can be arduous.Logical formLearned from7 sentences. A (land journey) can be arduous.Logical formLearned from7 sentences. A leg can be arduous.Logical formLearned from7 sentences. A descent can be arduous.Logical formLearned from7 sentences.