There are 6 shapes on a 7x7 grid. Which shape is closest to the gray trapezoid in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: gray trapezoid at (5, 4)
Distance from target shape to green right_triangle at (0, 1): 8
Distance from target shape to blue right_triangle at (2, 2): 5
Distance from target shape to pink right_triangle at (1, 3): 5
Distance from target shape to brown rectangle at (5, 0): 4
Distance from target shape to cyan square at (2, 6): 5
Closest shape is the brown rectangle at (5, 0) with distance 4</think>

<answer>(5, 0)</answer>