There are 2 shapes on a 7x7 grid. Which shape is closest to the pink 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: pink right_triangle at (1, 6)
Distance from target shape to cyan rectangle at (4, 4): 5
Closest shape is the cyan rectangle at (4, 4) with distance 5</think>

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