# set = {2,3,4,5,6,7,8,9,}
# print(set)
# set = {2,2,2,2,3,4,5,6,7,8,8,9,9,9,9,9,9,1,1,1,1,1}
# set.add(25)
# set.add(45)
# print(set)

# set = {45,56,74}
# l = ('kushal','hlooo')
# set.update(l)
# print(set)

# x = {2,3,4,4,5,6,7,}
# y = {12,23,34,45}
# set = x | y 
# print(set)

# a = {23,56,74,56}
# b = {43,87,98,65}
# set = a | b
# print(set)
# set = a - b 
# print(set)

# set = a ^ b 
# print (set)


# set = a & b 
# print ('intersection: ', a & b )
