There are 6 shapes on a 7x7 grid. Which shape is closest to the yellow square in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: yellow square at (2, 2)
Distance from target shape to green trapezoid at (6, 1): 5
Distance from target shape to purple trapezoid at (4, 0): 4
Distance from target shape to cyan right_triangle at (2, 1): 1
Distance from target shape to pink trapezoid at (5, 6): 7
Distance from target shape to orange right_triangle at (5, 2): 3
Closest shape is the cyan right_triangle at (2, 1) with distance 1</think>

<answer>(2, 1)</answer>