There are 5 shapes on a 7x7 grid. Which shape is closest to the red 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: red trapezoid at (1, 5)
Distance from target shape to yellow right_triangle at (1, 4): 1
Distance from target shape to blue trapezoid at (5, 1): 8
Distance from target shape to orange trapezoid at (4, 3): 5
Distance from target shape to brown right_triangle at (4, 0): 8
Closest shape is the yellow right_triangle at (1, 4) with distance 1</think>

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