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: Endospores are commonly found in soil and water. 
Sentence2: Some bacteria form resistant cells called endospores.

Output: Endospores


Input: Consider Input: Sentence1: Herbs are medicines and aids. 
Sentence2: herbs are used for curing people when they are sick.

Output: Herbs


Input: Consider Input: Sentence1: Meiosis is the type of cell division that produces gametes. 
Sentence2: Examples of gametes are ova and spermatozoa.


Output: gametes