There are 5 shapes on a 7x7 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 (5, 4)
Distance from target shape to purple square at (3, 4): 2
Distance from target shape to brown square at (0, 3): 6
Distance from target shape to cyan square at (2, 5): 4
Distance from target shape to orange square at (5, 3): 1
Closest shape is the orange square at (5, 3) with distance 1</think>

<answer>(5, 3)</answer>