Айти: объединение множеств А, В и С, пересечение множеств А, В и С, разность А\В

A = set(input())
B = set(input())
C = set(input())
union = A | B | C
intersec = A & B & C
A_B = A - B
B_A = B - A
sim_dif = A ^ B

def sets_from_names(last_name, first_name, middle_name):
  set_a = set(last_name)
  set_b = set(first_name)
  set_c = set(middle_name)
 
  union_ab = set_a.union(set_b)
  union_abc = union_ab.union(set_c)
  intersection_abc = set_a.intersection(set_b, set_c)
  difference_ab = set_a.difference(set_b)
  difference_ba = set_b.difference(set_a)
  symmetric_difference_ab = set_a.symmetric_difference(set_b)
 
  return union_abc, intersection_abc, difference_ab, difference_ba, symmetric_difference_ab
 
last_name = "Smith"
first_name = "John"
middle_name = "Michael"
 
union_abc, intersection_abc, difference_ab, difference_ba, symmetric_difference_ab = sets_from_names(last_name, first_name, middle_name)
 
print("Set A: ", set(last_name))
print("Set B: ", set(first_name))
print("Set C: ", set(middle_name))
print("Union of A, B, and C: ", union_abc)
print("Intersection of A, B, and C: ", intersection_abc)
print("Difference A/B: ", difference_ab)
print("Difference B/A: ", difference_ba)
print("Symmetric Difference of A and B: ", symmetric_difference_ab)

# Define sets for the surname, name, and patronymic
surname = set(input("Enter the letters in the surname: "))
name = set(input("Enter the letters in the name: "))
patronymic = set(input("Enter the letters in the patronymic: "))
 
# Find the union of the sets
union = surname.union(name).union(patronymic)
print("Union of the sets:", union)
 
# Find the intersection of the sets
intersection = surname.intersection(name).intersection(patronymic)
print("Intersection of the sets:", intersection)
 
# Find the difference between sets A and B
difference_AB = surname.difference(name)
print("Difference A \\ B:", difference_AB)
 
# Find the difference between sets B and A
difference_BA = name.difference(surname)
print("Difference B \\ A:", difference_BA)
 
# Find the symmetric difference between sets A and B
symmetric_difference = surname.symmetric_difference(name)
print("Symmetric difference of A and B:", symmetric_difference)