lst= [ "deer", "net", "malayalam", "ten", "reed"]

# def find_opposites(lst):

new_lst =[]
tup = []

for word in lst :

	rev_word = word[::-1]

	if rev_word in lst:

		tup.append(word)
		tup.append(rev_word)
		tup = tuple(tup)
		tup=[]
		new_lst.append(tup)
		lst.remove(word)
		lst.remove(rev_word)



	else:

	 	break



print(new_lst)