There are 5 shapes on a 6x6 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 (1, 2)
Distance from target shape to yellow trapezoid at (2, 2): 1
Distance from target shape to orange trapezoid at (5, 1): 5
Distance from target shape to purple rectangle at (4, 4): 5
Distance from target shape to brown right_triangle at (1, 0): 2
Closest shape is the yellow trapezoid at (2, 2) with distance 1</think>

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