employees1 = {"John", "Jane", "Linda"}
print(employees1)
print(len(employees1))


employees2 = set(["David", "Mark", "Marie"])
print(employees2)

empty = set()
print(empty)

a = set([1, 2, 2, 3, 4, 5, 3])
print(a)


first_set = set(("Connor", 32, (1, 2, 3)))
print(first_set)

second_set = set("Connor")
print(second_set)


primes = {2, 3, 5, 7}
print(primes)
evens = {2, 4, 6, 8}
print(evens)

# Union
print(primes | evens)  # primes.union(evens)

# Intersection
print(primes & evens)  # primes.intersection(evens)

# Difference
print(primes - evens)  # primes.difference(evens)

# Symmetric difference
print(primes ^ evens)  # primes.symmetric_difference(evens)

primes.add(11)
print(primes)

primes.remove(11)
print(primes)


a = {1, 2, 3, 4, 5, 6}
print(a)
b = {4, 5, 6, 7, 8, 9}
print(b)

a.update(b)  # a "union" operation
print(a)

a &= b  # the "intersection" operation
print(a)

a -= set((7, 8, 9))  # the "difference" operation
print(a)

a ^= b  # the "symmetric difference" operation
print(a)


add_set = set((1, 2, 3, 4))
print(add_set)

add_set.update((1,))
print(add_set)

add_set.update(("cello", "violin"))
print(add_set)

sub_set = add_set
sub_set.remove("violin")
print(sub_set)


ganadores = {"pedro", "pablo"}
jugadores = {"miguel", "antonio", "juan"}
print(jugadores.isdisjoint(ganadores))


a = frozenset((1, 2, 3, 4))
print(a)
b = frozenset(("w", "x", "y", "z"))
print(b)

d = {a: "hello", b: "world"}
print(d)