There are 6 shapes on a 7x7 grid. Which shape is closest to the red 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: red right_triangle at (6, 2)
Distance from target shape to gray trapezoid at (6, 6): 4
Distance from target shape to orange square at (5, 0): 3
Distance from target shape to yellow right_triangle at (2, 4): 6
Distance from target shape to green right_triangle at (5, 1): 2
Distance from target shape to cyan trapezoid at (6, 1): 1
Closest shape is the cyan trapezoid at (6, 1) with distance 1</think>

<answer>(6, 1)</answer>