There are 4 shapes on a 10x10 grid. Which shape is closest to the orange 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: orange right_triangle at (9, 6)
Distance from target shape to yellow right_triangle at (6, 2): 7
Distance from target shape to green square at (6, 9): 6
Distance from target shape to cyan square at (5, 0): 10
Closest shape is the green square at (6, 9) with distance 6</think>

<answer>(6, 9)</answer>