def whisper_cipher(text: str, shift: int) -> str:
    result = []
    for c in text:
        if "a" <= c <= "z":
            result.append(chr((ord(c) - ord("a") + shift) % 26 + ord("a")))
        elif "A" <= c <= "Z":
            result.append(chr((ord(c) - ord("A") + shift) % 26 + ord("A")))
        else:
            result.append(c)
    return "".join(result)