def get_col_coords(vert_line_coords):
    """Get top-left and bottom-right coordinates for each column from a list of vertical lines"""
    col_coords = []
    for i in range(1, len(vert_line_coords)):
        if vert_line_coords[i][0] - vert_line_coords[i-1][0] > 1:
            col_coords.append((vert_line_coords[i-1][0], vert_line_coords[i-1][1],
                               vert_line_coords[i][2], vert_line_coords[i][3]))
    return col_coords