s = {12, "45", 12.0}  # here, it will read 12 and 12.0 as a single element
s1 = {12, "45", 12.1}  
print(s)
print(len(s))   # thus here, output length is 2
print(s1)
print(len(s1))

s = { 2, 7 ,(2, 4), 3}
print(s)