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: Many of foods that humans eat are cooked, recooked, and then warmed up. 
Sentence2: humans add heat energy to their food.

foods