You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, positions of two consecutive words have been swapped. You need to output the position of the swaped words. e.g. in the sentence 'Seattle has nice a weather', the word 'a' and 'nice' have been swapped. These words are at 3rd and 4th position respectively. So, the output should be (3, 4). Note that the index of first word is 1.

I a am professional dancer.
Solution: (2,3)
Why? words 'a' and 'am' have been swapped. The correct sentence would be 'I am a professional dancer.'. Since the position of 'a' is 2 and 'am' is 3, the answer is (2,3).

New input: A man the sweeping sidewalk near a big building
Solution:
(3, 4)