Set
s = {1,2,3,4,5,1,'a',1,3,3,3,4,'b',4,4,5,5,5}
print(s,type(s))
a = "hello world"
print(set(a))
### output is in random order
a = {1,2,3,4}
b = {3,4,5,6}
print ()
print (a & b) # intersection
print (a | b) # join, +, union
print (a - b) # from a remove intersection
print (a ^ b) # xorINFO