There are 6 shapes on a 7x7 grid. Which shape is closest to the gray 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: gray right_triangle at (4, 6)
Distance from target shape to pink right_triangle at (5, 6): 1
Distance from target shape to red trapezoid at (1, 4): 5
Distance from target shape to orange right_triangle at (5, 0): 7
Distance from target shape to purple trapezoid at (1, 3): 6
Distance from target shape to brown right_triangle at (0, 5): 5
Closest shape is the pink right_triangle at (5, 6) with distance 1</think>

<answer>(5, 6)</answer>