return a list of courses from COURSES where the supplied set and the course's value (also a set) overlap.

#these are the instructions
# write a function named covers
# that accepts a single parameter,
# a set of topics
# return a list of courses from COURSES
# where the supplied set
# and the course's value
# (also a set) overlap
# example, covers({"Python"}) 
# would return ["Python Basics"]
# .......................................................

def covers(topics): # topics = type set 
    list_of_courses = [] # the key for topics that overlap
    # compare topics w/ dct value
    # if topics and value overlap
    # append key to list_of_courses

    return list_of_courses


COURSES = { # type = dict 
    # key = type string value = type set
    "Python Basics": {"Python", "functions", "variables",
                      "booleans", "integers", "floats",
                      "arrays", "strings", "exceptions",
                      "conditions", "input", "loops"},
    "Java Basics": {"Java", "strings", "variables",
                    "input", "exceptions", "integers",
                    "booleans", "loops"},
    "PHP Basics": {"PHP", "variables", "conditions",
                   "integers", "floats", "strings",
                   "booleans", "HTML"},
    "Ruby Basics": {"Ruby", "strings", "floats",
                    "integers", "conditions",
                    "functions", "input"}
}

set_of_topics = {"boolean", "integers",  "strings"}

# set of topics = type set
covers(set_of_topics)