There are 5 shapes on a 8x8 grid. Which shape is closest to the red 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: red square at (1, 1)
Distance from target shape to orange right_triangle at (1, 3): 2
Distance from target shape to blue square at (3, 4): 5
Distance from target shape to purple rectangle at (7, 1): 6
Distance from target shape to cyan right_triangle at (1, 2): 1
Closest shape is the cyan right_triangle at (1, 2) with distance 1</think>

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