There are 5 shapes on a 5x5 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 (1, 3)
Distance from target shape to yellow trapezoid at (1, 1): 2
Distance from target shape to cyan square at (4, 4): 4
Distance from target shape to gray square at (3, 1): 4
Distance from target shape to orange trapezoid at (0, 2): 2
Closest shape is the yellow trapezoid at (1, 1) with distance 2</think>

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