def data() -> str:
    """
    Test data for day_01.

    Returns
    -------
    data: str
    """
    data = (
        'L.LL.LL.LL\n'
        'LLLLLLL.LL\n'
        'L.L.L..L..\n'
        'LLLL.LL.LL\n'
        'L.LL.LL.LL\n'
        'L.LLLLL.LL\n'
        '..L.L.....\n'
        'LLLLLLLLLL\n'
        'L.LLLLLL.L\n'
        'L.LLLLL.LL'
    )
    return data