def convert_sudoku_grid_to_string(sudoku_grid: list) -> str:
    """
    Converts a sudoku 3d list grid to a string

    :param sudoku_grid: A 3D list sudoku grid
    :return: A string representation of a sudoku from top left to bottom right (0-9 0 for blank)
    """
    values = []
    try:
        for row in range(0, 9):
            for column in range(0, 9):
                values.append(str(sudoku_grid[row][column][0]))
        return ''.join(values)
    except IndexError:
        return ''