There are 5 shapes on a 7x7 grid. Which shape is closest to the brown 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: brown right_triangle at (0, 1)
Distance from target shape to green right_triangle at (6, 6): 11
Distance from target shape to blue trapezoid at (2, 2): 3
Distance from target shape to red right_triangle at (2, 5): 6
Distance from target shape to gray trapezoid at (3, 5): 7
Closest shape is the blue trapezoid at (2, 2) with distance 3</think>

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