There are 5 shapes on a 9x9 grid. Which shape is closest to the gray 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: gray right_triangle at (6, 2)
Distance from target shape to cyan trapezoid at (5, 4): 3
Distance from target shape to blue right_triangle at (4, 3): 3
Distance from target shape to yellow right_triangle at (2, 7): 9
Distance from target shape to green right_triangle at (1, 1): 6
Closest shape is the cyan trapezoid at (5, 4) with distance 3</think>

<answer>(5, 4)</answer>