Task: Write a function called firstNonRepeated that takes a single string s as input and returns the first non-repeated character in the string. If there is no non-repeated character, return an empty string.

Input: A string s containing lowercase and/or uppercase English letters.

Output: A string representing the first non-repeated character in the input string or an empty string if there is no non-repeated character.

Example:

firstNonRepeated("hello") => "h"

firstNonRepeated("aabcc") => "b"

firstNonRepeated("aabbcc") => ""

** You can use any one of the following programming languages: Typescript, Java, Kotlin, Swift