import string

def rot13(text: str) -> str:
    # Alphabet constants
    lowercase = string.ascii_lowercase
    uppercase = string.ascii_uppercase

    rot_str = ""

    for char in text:
        if char in lowercase:
            rot_str += lowercase[(lowercase.index(char) + 13) % 26]
        elif char in uppercase:
            rot_str += uppercase[(uppercase.index(char) + 13) % 26]
        else:
            rot_str += char

    return rot_str