firstSet = {2, 3, 4, 5}
secondSet = {1, 3, 5, 7}
print(firstSet - secondSet)
# {2, 4}
# The difference() function can be used to create a new set containing the difference
# from one set with another
mySet = {1, 2, 3, 4}
mySet2 = {3, 4, 5, 6}
mySet3 = mySet.difference(mySet2)
print(mySet3)
# Output:
# {1, 2}