There are 6 shapes on a 6x6 grid. Which shape is closest to the orange 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: orange right_triangle at (1, 0)
Distance from target shape to cyan rectangle at (1, 1): 1
Distance from target shape to gray square at (4, 5): 8
Distance from target shape to pink square at (4, 1): 4
Distance from target shape to red square at (4, 3): 6
Distance from target shape to green trapezoid at (2, 1): 2
Closest shape is the cyan rectangle at (1, 1) with distance 1</think>

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