That is all there is to it. The logic is exactly the same as the "crane and turtle" problem learned in junior high school, where you can guess the number of cranes and turtles if you have two hints.

The film “Mary Oliver: Saved by the Beauty of the World” works best when it illuminates her work, whose fans include Stephen Colbert and Oprah Winfrey. By Alissa Wilkinson This silly supernatural ...