There are 4 shapes on a 8x8 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 (0, 2)
Distance from target shape to cyan right_triangle at (5, 4): 7
Distance from target shape to yellow right_triangle at (7, 5): 10
Distance from target shape to red trapezoid at (2, 7): 7
Closest shape is the cyan right_triangle at (5, 4) with distance 7</think>

<answer>(5, 4)</answer>