Definition: 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: Sentence1: For one, animal fur becomes thicker and more abundant during the winter months. 
Sentence2: In the winter months, animal fur is more abundant for warmth.

winter