There are 5 shapes on a 8x8 grid. Which shape is closest to the cyan 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: cyan trapezoid at (1, 7)
Distance from target shape to blue trapezoid at (1, 0): 7
Distance from target shape to green trapezoid at (4, 0): 10
Distance from target shape to orange right_triangle at (1, 5): 2
Distance from target shape to pink right_triangle at (7, 6): 7
Closest shape is the orange right_triangle at (1, 5) with distance 2</think>

<answer>(1, 5)</answer>