There are 3 shapes on a 7x7 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, 4)
Distance from target shape to yellow trapezoid at (2, 2): 3
Distance from target shape to brown right_triangle at (2, 3): 2
Closest shape is the brown right_triangle at (2, 3) with distance 2</think>

<answer>(2, 3)</answer>