2. What does the following Python program do? # ! /usr/bin/Python3 def abark( dog, cat goose -dog + cat for x in goose: if x 1n cat and x not in dog: cov.append (x) if x not in cat and x in dog: cox.append(x) duck -0 for i in rangetlea(cou)): if couli] ot in couto: duck. append (cowli]) 1]: raturn duck def nain O: dog-input('> ') cat input ( duck shark( dog, cat print ".Joia(duck) ) main()