There are 2 shapes on a 6x6 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 (5, 1)
Distance from target shape to brown right_triangle at (1, 4): 7
Closest shape is the brown right_triangle at (1, 4) with distance 7</think>

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