Write down the command that should be put instead of ... to get a set of symbols that the set a and the string b both contain.
a = set("my code is brOKen")
b = "i'm not OK with that"
c = ...Do NOT convert b to a set in your solution, it should remain a string.
Tip: What is the difference between set methods and operators? Use the one that works with iterable objects such as strings.