There are 4 shapes on a 6x6 grid. Which shape is closest to the orange 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: orange right_triangle at (5, 2)
Distance from target shape to gray trapezoid at (3, 4): 4
Distance from target shape to cyan square at (0, 0): 7
Distance from target shape to pink right_triangle at (4, 3): 2
Closest shape is the pink right_triangle at (4, 3) with distance 2</think>

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