s1 = {'Python', 'Java'}
s2 = {'C#', 'Java'}
s = s1.union(s2)
print(s)
firstSet = {2, 3, 4, 5}
secondSet = {1, 3, 5, 7}
print(firstSet | secondSet)
# {1, 2, 3, 4, 5, 7}
x = {"apple", "banana", "cherry"}
y = {"google", "microsoft", "apple"}
z = x.union(y)