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

Ex Output:
bright


Ex Input:
Sentence1: Mating is generally preceded by courtship. 
Sentence2: Mating is generally similar across species.

Ex Output:
Mating


Ex Input:
Sentence1: Digestion is the process of breaking down food into components the body can absorb. 
Sentence2: Digestion is the process of breaking down food proteins into energy or heat.

Ex Output:

Digestion