There are 4 shapes on a 7x7 grid. Which shape is closest to the orange 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: orange right_triangle at (6, 2)
Distance from target shape to pink trapezoid at (5, 1): 2
Distance from target shape to blue right_triangle at (2, 6): 8
Distance from target shape to yellow square at (6, 1): 1
Closest shape is the yellow square at (6, 1) with distance 1</think>

<answer>(6, 1)</answer>