There are 2 shapes on a 9x9 grid. Which shape is closest to the green 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: green square at (6, 6)
Distance from target shape to cyan right_triangle at (4, 1): 7
Closest shape is the cyan right_triangle at (4, 1) with distance 7</think>

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