There are 6 shapes on a 8x8 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 (1, 7)
Distance from target shape to red trapezoid at (3, 0): 9
Distance from target shape to blue trapezoid at (4, 0): 10
Distance from target shape to yellow right_triangle at (0, 5): 3
Distance from target shape to cyan trapezoid at (0, 2): 6
Distance from target shape to brown right_triangle at (4, 4): 6
Closest shape is the yellow right_triangle at (0, 5) with distance 3</think>

<answer>(0, 5)</answer>