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: All sharks are predators. 
Sentence2: hiding can be used for avoiding sharks.

Output: sharks


Input: Consider Input: Sentence1: Minerals are chemical elements that are essential for body processes. 
Sentence2: Eggs are loaded with vitamins and minerals.

Output: Minerals


Input: Consider Input: Sentence1: Mammals breathe with the help of a diaphragm. 
Sentence2: Mammals breathe by relaxing the lungs.


Output: Mammals