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: Basically the process is pretty simple. 
Sentence2: All cells share some of the same structures and simple processes.

Ex Output:
process


Ex Input:
Sentence1: Competition may lead to aggressive behaviors or displays of aggression. 
Sentence2: Aggression Aggression and violence often go together.

Ex Output:
aggression


Ex Input:
Sentence1: Climate influences plant growth, biodiversity, and adaptations of land organisms. 
Sentence2: Global warming influences plant growth, biodiversity, and adaptations of land organisms.

Ex Output:

adaptations