There are 5 shapes on a 6x6 grid. Which shape is closest to the blue square in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: blue square at (1, 2)
Distance from target shape to yellow right_triangle at (5, 0): 6
Distance from target shape to gray right_triangle at (5, 1): 5
Distance from target shape to cyan rectangle at (3, 0): 4
Distance from target shape to brown rectangle at (1, 0): 2
Closest shape is the brown rectangle at (1, 0) with distance 2</think>

<answer>(1, 0)</answer>