There are 4 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 (1, 1)
Distance from target shape to orange rectangle at (1, 2): 1
Distance from target shape to cyan right_triangle at (2, 0): 2
Distance from target shape to green rectangle at (0, 3): 3
Closest shape is the orange rectangle at (1, 2) with distance 1</think>

<answer>(1, 2)</answer>