There are 4 shapes on a 10x10 grid. Which shape is closest to the blue 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: blue trapezoid at (6, 6)
Distance from target shape to pink right_triangle at (1, 4): 7
Distance from target shape to cyan trapezoid at (1, 3): 8
Distance from target shape to gray right_triangle at (7, 2): 5
Closest shape is the gray right_triangle at (7, 2) with distance 5</think>

<answer>(7, 2)</answer>