There are 2 shapes on a 5x5 grid. Which shape is closest to the green right_triangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: green right_triangle at (3, 4)
Distance from target shape to cyan rectangle at (4, 3): 2
Closest shape is the cyan rectangle at (4, 3) with distance 2</think>

<answer>(4, 3)</answer>