A glint can be challenging.Logical formLearned from11 sentences. Observations can be challenging.Logical formLearned from11 sentences. Investigations can be challenging.Logical formLearned from11 sentences. Toys can be challenging.Logical formLearned from11 sentences. Writers can be challenging.Logical formLearned from11 sentences. Dynamics can be challenging.Logical formLearned from11 sentences. Adventures can be challenging.Logical formLearned from11 sentences. A (data transmission) can be challenging.Logical formLearned from11 sentences. A tone can be challenging.Logical formLearned from11 sentences. Desserts can be challenging.Logical formLearned from11 sentences. A space can be challenging.Logical formLearned from11 sentences. A picture can be challenging.Logical formLearned from11 sentences. A record can be challenging.Logical formLearned from11 sentences. A part-time job can be challenging.Logical formLearned from11 sentences. Humanitarian crises can be challenging.Logical formLearned from11 sentences.