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 (2, 6)
Distance from target shape to blue square at (0, 6): 2
Distance from target shape to green trapezoid at (0, 3): 5
Distance from target shape to yellow rectangle at (3, 0): 7
Distance from target shape to red rectangle at (5, 4): 5
Closest shape is the blue square at (0, 6) with distance 2</think>

<answer>(0, 6)</answer>