def rot13(text: str) -> str:
    result = ""

    for char in text:
        if "A" <= char <= "Z":
            result += chr((ord(char) - ord("A") + 13) % 26 + ord("A"))
        elif "a" <= char <= "z":
            result += chr((ord(char) - ord("a") + 13) % 26 + ord("a"))
        else:
            result += char

    return result