There are 4 shapes on a 10x10 grid. Which shape is closest to the green 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: green right_triangle at (5, 7)
Distance from target shape to blue rectangle at (1, 0): 11
Distance from target shape to brown rectangle at (2, 0): 10
Distance from target shape to yellow square at (2, 7): 3
Closest shape is the yellow square at (2, 7) with distance 3</think>

<answer>(2, 7)</answer>