There are 5 shapes on a 5x5 grid. Which shape is closest to the yellow 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: yellow right_triangle at (3, 0)
Distance from target shape to brown square at (0, 1): 4
Distance from target shape to gray right_triangle at (3, 4): 4
Distance from target shape to blue square at (4, 1): 2
Distance from target shape to pink trapezoid at (1, 4): 6
Closest shape is the blue square at (4, 1) with distance 2</think>

<answer>(4, 1)</answer>