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

<answer>(1, 2)</answer>