There are 3 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 (1, 2)
Distance from target shape to blue trapezoid at (6, 1): 6
Distance from target shape to pink right_triangle at (3, 6): 6
Closest shape is the blue trapezoid at (6, 1) with distance 6</think>

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