There are 6 shapes on a 6x6 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, 4)
Distance from target shape to brown rectangle at (5, 0): 8
Distance from target shape to gray square at (4, 2): 5
Distance from target shape to blue right_triangle at (2, 5): 2
Distance from target shape to pink rectangle at (0, 5): 2
Distance from target shape to red trapezoid at (5, 5): 5
Closest shape is the blue right_triangle at (2, 5) with distance 2</think>

<answer>(2, 5)</answer>