a={1,2,3,4} b={3,4,5,6} print(a & b) # intersection print(a | b) # join, + ,union print(a - b) # from a remove intersection print(a ^ b) # xor,(a | b) - (a & b) x="hello" y="world" print(set(x) & set(set(y)) print(set(x) ^ set(set(y))