There are 6 shapes on a 6x6 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 (5, 4)
Distance from target shape to blue trapezoid at (4, 3): 2
Distance from target shape to gray square at (1, 3): 5
Distance from target shape to brown square at (0, 4): 5
Distance from target shape to red right_triangle at (5, 5): 1
Distance from target shape to purple square at (3, 5): 3
Closest shape is the red right_triangle at (5, 5) with distance 1</think>

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