There are 6 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 (6, 5)
Distance from target shape to green square at (2, 6): 5
Distance from target shape to orange right_triangle at (4, 0): 7
Distance from target shape to blue trapezoid at (5, 4): 2
Distance from target shape to cyan right_triangle at (0, 1): 10
Distance from target shape to pink trapezoid at (5, 0): 6
Closest shape is the blue trapezoid at (5, 4) with distance 2</think>

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