def read_input(path: str):
    """
    Read game board file from path.
    Return list of str.
    """
    digits = []

    with open(path, 'r') as data:

        for line in data:
            line = line.strip()
            line = line.split(' ')
            str_digits = []

            for digit in line:
                str_digits.append(digit)

            digits.extend(str_digits)

    return digits