There are 2 shapes on a 8x8 grid. Which shape is closest to the cyan 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: cyan square at (2, 4)
Distance from target shape to gray right_triangle at (4, 1): 5
Closest shape is the gray right_triangle at (4, 1) with distance 5</think>

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