#Two ways of difference
# - operator
# difference() method

print("- operator")
set1 = {"a","b","c","d"}
set2 = {"c","d"}
print(set1-set2)
print()

print("difference() method")
set3 = {"a","b","c","d"}
set4 = {"c","d"}
print(set3.difference(set4))


