There are 6 shapes on a 5x5 grid. Which shape is closest to the blue square 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 square at (1, 4)
Distance from target shape to red right_triangle at (2, 1): 4
Distance from target shape to orange trapezoid at (0, 1): 4
Distance from target shape to yellow right_triangle at (4, 4): 3
Distance from target shape to pink square at (2, 0): 5
Distance from target shape to gray right_triangle at (3, 2): 4
Closest shape is the yellow right_triangle at (4, 4) with distance 3</think>

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