Write a method that returns the list of people in 'strs' prioritized using the priorities in 'priority'. Prioritizing works by placing all the people into a new array with all the priority 1's first, then all the priority 2's, and so on until the number representing the lowest priority is reached. Priorities could range from 1 to 10000, but might not all be present and might have some missing. For example, there could be priorities 1, 2, 5, and 7 but no others, or any other combination of the numbers 1 through 10 (inclusive)