There are 4 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 (6, 7)
Distance from target shape to blue trapezoid at (5, 0): 8
Distance from target shape to orange trapezoid at (7, 7): 1
Distance from target shape to yellow square at (5, 8): 2
Closest shape is the orange trapezoid at (7, 7) with distance 1</think>

<answer>(7, 7)</answer>