Create a function that accepts a string as an argument and returns the first non-repeated character.
first_non_repeated_character("g") ➞ "g"
first_non_repeated_character("it was then the frothy word met the round night") ➞ "a"
first_non_repeated_character("the quick brown fox jumps then quickly blows air") ➞ "f"
first_non_repeated_character("hheelloo") ➞ False
first_non_repeated_character("") ➞ False
False.False.