There are 4 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 (0, 4)
Distance from target shape to yellow right_triangle at (5, 4): 5
Distance from target shape to gray square at (6, 0): 10
Distance from target shape to cyan right_triangle at (6, 3): 7
Closest shape is the yellow right_triangle at (5, 4) with distance 5</think>

<answer>(5, 4)</answer>