There are 6 shapes on a 10x10 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 (1, 5)
Distance from target shape to gray square at (1, 4): 1
Distance from target shape to cyan trapezoid at (7, 9): 10
Distance from target shape to pink right_triangle at (0, 5): 1
Distance from target shape to purple right_triangle at (4, 9): 7
Distance from target shape to green square at (0, 9): 5
Closest shape is the gray square at (1, 4) with distance 1</think>

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