There are 2 shapes on a 10x10 grid. Which shape is closest to the brown 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: brown right_triangle at (7, 1)
Distance from target shape to red rectangle at (1, 1): 6
Closest shape is the red rectangle at (1, 1) with distance 6</think>

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