There are 5 shapes on a 7x7 grid. Which shape is closest to the yellow right_triangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: yellow right_triangle at (4, 4)
Distance from target shape to brown trapezoid at (0, 1): 7
Distance from target shape to blue trapezoid at (5, 4): 1
Distance from target shape to red rectangle at (4, 2): 2
Distance from target shape to orange trapezoid at (3, 0): 5
Closest shape is the blue trapezoid at (5, 4) with distance 1</think>

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