Properties can be difficult.Logical formLearned from9 sentences. Syndrome can be difficult.Logical formLearned from9 sentences. Interoperation can be difficult.Logical formLearned from9 sentences. Germination can be difficult.Logical formLearned from9 sentences. Settlers may prove difficult.Logical formLearned from9 sentences. Identity can be difficult.Logical formLearned from9 sentences. A relationship may prove difficult.Logical formLearned from9 sentences. A direction can be difficult.Logical formLearned from9 sentences. A .... can be difficult.Logical formLearned from9 sentences. Dryings can be difficult.Logical formLearned from9 sentences. A posture can be difficult.Logical formLearned from9 sentences. Orders can be difficult.Logical formLearned from9 sentences. Attempts may proven difficult.Logical formLearned from9 sentences. A (rookie season) can be difficult.Logical formLearned from9 sentences. (Control problems) can be difficult.Logical formLearned from9 sentences.