def METHOD_NAME(length: int, t: type = None):
    program = ""
    for i in range(length + 1):
        if t is None:
            program += f"x{i}, "
        elif t == int:
            program += f"{i}, "
        elif t == bool:
            program += f"{i % 2 == 0}, "
        elif t == str:
            program += f"'{str(chr(i+97))}', "
    return program