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: Angiosperm sporophyte is dominant. 
Sentence2: Flowers form on angiosperms.

Ex Output:
Angiosperm


Ex Input:
Sentence1: An intense bright light produces a glare. 
Sentence2: Nuclear reactions in stars cause stars to produce bright glares.

Ex Output:
bright


Ex Input:
Sentence1: Viruses cannot reproduce by themselves. 
Sentence2: Bats can also transmit rabies and rabies-like viruses.

Ex Output:

Viruses