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

<answer>(2, 7)</answer>