There are 5 shapes on a 10x10 grid. Which shape is closest to the cyan 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: cyan right_triangle at (6, 6)
Distance from target shape to yellow right_triangle at (4, 5): 3
Distance from target shape to green trapezoid at (5, 4): 3
Distance from target shape to orange right_triangle at (9, 2): 7
Distance from target shape to pink rectangle at (4, 3): 5
Closest shape is the yellow right_triangle at (4, 5) with distance 3</think>

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