Tight ends can be rugged.Logical formLearned from3 sentences. A bedrock can be rugged.Logical formLearned from3 sentences. A (microlaser system) can be rugged.Logical formLearned from3 sentences. Fjords can be rugged.Logical formLearned from3 sentences. Shores can be rugged.Logical formLearned from3 sentences. A contour can be rugged.Logical formLearned from3 sentences. A (mountain topography) can be rugged.Logical formLearned from3 sentences. Others can be rugged.Logical formLearned from3 sentences. A (mountain beauty) can be rugged.Logical formLearned from3 sentences. (Granite hills) can be rugged.Logical formLearned from3 sentences. Extremes can be rugged.Logical formLearned from3 sentences. Winters can be rugged.Logical formLearned from3 sentences. Backpackers can be rugged.Logical formLearned from3 sentences. A diversity can be rugged.Logical formLearned from3 sentences. Blue mountains can be rugged.Logical formLearned from3 sentences.