There are 4 shapes on a 7x7 grid. Which shape is closest to the yellow 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: yellow trapezoid at (6, 1)
Distance from target shape to brown right_triangle at (2, 0): 5
Distance from target shape to orange square at (5, 3): 3
Distance from target shape to gray square at (3, 0): 4
Closest shape is the orange square at (5, 3) with distance 3</think>

<answer>(5, 3)</answer>