There are 4 shapes on a 7x7 grid. Which shape is closest to the gray 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: gray square at (4, 2)
Distance from target shape to orange square at (1, 4): 5
Distance from target shape to yellow right_triangle at (2, 6): 6
Distance from target shape to pink trapezoid at (3, 6): 5
Closest shape is the orange square at (1, 4) with distance 5</think>

<answer>(1, 4)</answer>