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

<answer>(2, 6)</answer>