There are 6 shapes on a 6x6 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 (3, 3)
Distance from target shape to orange square at (5, 5): 4
Distance from target shape to red rectangle at (1, 3): 2
Distance from target shape to green rectangle at (5, 2): 3
Distance from target shape to blue square at (4, 3): 1
Distance from target shape to yellow trapezoid at (5, 0): 5
Closest shape is the blue square at (4, 3) with distance 1</think>

<answer>(4, 3)</answer>