You shouldn't call on `$shelter` inside of the shelter class, as it represents a single instance of the Shelter class, and therefore may not always exist if you were to create other instances of the shelter class.

Instead you can do `@clients.each { |k, v| puts (v.to_s) + "\n" }` or `clients.each { |k, v| puts (v.to_s) + "\n" }`