Have you heard," he said "that many of our people believe if you know five colloquial expressions in their tribal language, they must always provide you with nourishment and shelter? But-" He paused as though to make sure she was paying attention. "But if you know fewer than five, they owe you not even a sip of water." She nodded, understanding his point, but he pressed it. "Learn those five phrases, Miss Sweeney," he said.