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diff --git a/challenge-334/sgreen/python/ch-2.py b/challenge-334/sgreen/python/ch-2.py
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+++ b/challenge-334/sgreen/python/ch-2.py
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+#!/usr/bin/env python3
+
+from dataclasses import dataclass
+import sys
+
+
+@dataclass(frozen=True)
+class Point:
+    """A point in 2D space with x and y coordinates."""
+    x: int
+    y: int
+
+    def __sub__(self, other: 'Point') -> int:
+        """Calculate the Manhattan distance between this point and another."""
+        return abs(self.x - other.x) + abs(self.y - other.y)
+
+
+def shortest_index(x: int, y: int, points_list: list[list[int]]) -> int:
+    """Find the index of the point closest to (x, y) that shares either x or y coordinate.
+    If no such point exists, return -1.
+
+    Args:
+        x (int): The x coordinate of the starting point.
+        y (int): The y coordinate of the starting point.
+        points_list (list[list[int]]): A list of points, each represented as a list of two integers [x, y].
+
+    Returns:
+        int: The index of the closest point that shares either x or y coordinate, or -1 if none exists.
+    """
+
+    # Turn the input parameters into Point objects
+    starting_point = Point(x, y)
+    points = [Point(*point) for point in points_list]
+
+    # Initialize variables to track the minimum distance and corresponding index
+    min_distance = None
+    min_index = -1
+
+    for index, point in enumerate(points):
+        # Check if the point shares either x or y coordinate with the starting point
+        if point.x != starting_point.x and point.y != starting_point.y:
+            continue
+
+        # Calculate the distance from the starting point to the current point
+        # and update the minimum distance and index if necessary
+        distance = starting_point - point
+        if min_distance is None or distance < min_distance:
+            min_distance = distance
+            min_index = index
+
+    # Return the index of the closest point, or -1 if no such point was found
+    return min_index
+
+
+def main():
+    # Convert input into integers
+    array = [int(n) for n in sys.argv[1:]]
+    x = array.pop(0)  # First element is x
+    y = array.pop(0)  # Second element is y
+    points = [array[i:i + 2] for i in range(0, len(array), 2)]
+    result = shortest_index(x, y, points)
+    print(result)
+
+
+if __name__ == '__main__':
+    main()