7. Suppose you have a set of N project managers and 2N software engineers. Each project manager is only willing to work with certain software engineers. The software engineers have no preferences. Design an algorithm to divide this group into N teams, each containing one project manager and two software engineers, such that the project manager preferences are not violated (i.e., no project manager has to work with a software engineer that they dont want to work with).

Treat single arithmetic operations (addition, subtraction, multiplication, and division) as constant time operations.