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: Viruses are usually considered to be nonliving. 
Sentence2: Viruses are usually acquired from contact with infected animals.

Output: Viruses


Input: Consider Input: Sentence1: soil is formed by weathering. 
Sentence2: Something described as loamy is formed by weathering.

Output: formed


Input: Consider Input: Sentence1: Endospores are commonly found in soil and water. 
Sentence2: a means of reproduction are commonly found in soil and water.


Output: commonly