def string_to_board(board_in_string):
    """Converts string into sudoku board

    params : board_in_string : string

    returns : list
    """
    board = []

    for row in range(9):
        row_list = []
        for col in range(9):
            row_list.append(int(board_in_string[row * 9 + col]))
        board.append(row_list)

    return board