There are 4 shapes on a 8x8 grid. Which shape is closest to the orange 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: orange trapezoid at (1, 3)
Distance from target shape to cyan square at (5, 6): 7
Distance from target shape to pink square at (7, 7): 10
Distance from target shape to gray right_triangle at (1, 1): 2
Closest shape is the gray right_triangle at (1, 1) with distance 2</think>

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