There are 5 shapes on a 7x7 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 (2, 5)
Distance from target shape to blue rectangle at (1, 4): 2
Distance from target shape to gray rectangle at (0, 5): 2
Distance from target shape to pink rectangle at (0, 0): 7
Distance from target shape to cyan right_triangle at (2, 0): 5
Closest shape is the blue rectangle at (1, 4) with distance 2</think>

<answer>(1, 4)</answer>