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

<answer>(0, 1)</answer>