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: Veins generally carry deoxygenated blood. 
Sentence2: Blood carries blood cells.

Output: blood


Input: Consider Input: Sentence1: Nitrogen is found in proteins, nucleic acids, and chlorophyll. 
Sentence2: Life without protein is impossible.

Output: proteins


Input: Consider Input: Sentence1: Soil can be depleted of nutrients. 
Sentence2: mineral particles and organic matter can be depleted of nutrients.


Output: depleted