There are 4 shapes on a 10x10 grid. Which shape is closest to the blue 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: blue right_triangle at (5, 4)
Distance from target shape to pink right_triangle at (1, 1): 7
Distance from target shape to orange right_triangle at (7, 4): 2
Distance from target shape to purple square at (1, 2): 6
Closest shape is the orange right_triangle at (7, 4) with distance 2</think>

<answer>(7, 4)</answer>