Generate an overlapping word between the given two sentences. When you find the overlapping words, they don't have to match exactly, e.g., "survival" and "survive" are valid overlapping words. Little words like "the" or "of" don't count! You must generate significant words which are not the stop words.

Ex Input:
Sentence1: information in an organism 's chromosomes cause genetic traits to be passed down to that organism 's offspring. 
Sentence2: information in Man's chromosomes cause genetic traits to be passed down to offspring.

Ex Output:
chromosomes


Ex Input:
Sentence1: Polyps usually reproduce asexually. 
Sentence2: Polyps usually reproduce several different ways.

Ex Output:
Polyps


Ex Input:
Sentence1: a magnet moving in a coil of copper wire can cause an electric current. 
Sentence2: Electricity is passed through the copper to magnetize the core.

Ex Output:

copper