There are 5 shapes on a 7x7 grid. Which shape is closest to the pink 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: pink right_triangle at (2, 2)
Distance from target shape to yellow square at (0, 6): 6
Distance from target shape to purple trapezoid at (5, 5): 6
Distance from target shape to gray right_triangle at (3, 4): 3
Distance from target shape to orange rectangle at (6, 1): 5
Closest shape is the gray right_triangle at (3, 4) with distance 3</think>

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