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: Hair is used to insulate and keep the body warm in a large variety of climates. 
Sentence2: Hair helps to keep the body warm and protect it in a variety of climates.

body