There are 4 shapes on a 7x7 grid. Which shape is closest to the cyan 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: cyan right_triangle at (2, 2)
Distance from target shape to green right_triangle at (2, 6): 4
Distance from target shape to orange rectangle at (1, 0): 3
Distance from target shape to blue square at (1, 3): 2
Closest shape is the blue square at (1, 3) with distance 2</think>

<answer>(1, 3)</answer>