There are 4 shapes on a 8x8 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 (0, 4)
Distance from target shape to orange right_triangle at (3, 3): 4
Distance from target shape to yellow square at (4, 1): 7
Distance from target shape to red trapezoid at (1, 2): 3
Closest shape is the red trapezoid at (1, 2) with distance 3</think>

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