There are 6 shapes on a 8x8 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 (4, 1)
Distance from target shape to pink rectangle at (2, 0): 3
Distance from target shape to cyan right_triangle at (0, 0): 5
Distance from target shape to red square at (3, 7): 7
Distance from target shape to gray right_triangle at (4, 0): 1
Distance from target shape to brown trapezoid at (5, 2): 2
Closest shape is the gray right_triangle at (4, 0) with distance 1</think>

<answer>(4, 0)</answer>