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.

Input: Consider Input: Sentence1: Plants live just about everywhere on Earth. 
Sentence2: epiphytes live everywhere on earth.

Output: everywhere


Input: Consider Input: Sentence1: Carpools and vanpools can save time. 
Sentence2: vanpools decrease the amount of cars used to travel to a place.

Output: vanpools


Input: Consider Input: Sentence1: Mammals are like other chordates in that they have backbones. 
Sentence2: Mammals are like other vertebrates that have a backbone.


Output: Mammals