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

<answer>(5, 6)</answer>