There are 4 shapes on a 5x5 grid. Which shape is closest to the blue trapezoid in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: blue trapezoid at (1, 3)
Distance from target shape to brown square at (0, 0): 4
Distance from target shape to cyan right_triangle at (2, 1): 3
Distance from target shape to yellow trapezoid at (1, 2): 1
Closest shape is the yellow trapezoid at (1, 2) with distance 1</think>

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