There are 5 shapes on a 10x10 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 (7, 1)
Distance from target shape to brown trapezoid at (0, 2): 8
Distance from target shape to cyan right_triangle at (4, 0): 4
Distance from target shape to blue rectangle at (3, 7): 10
Distance from target shape to orange right_triangle at (7, 7): 6
Closest shape is the cyan right_triangle at (4, 0) with distance 4</think>

<answer>(4, 0)</answer>