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: Tight fitting shoes can increase the pressure on the skin and exacerbates the pain. 
Sentence2: Nerves can be used to feel heat and pain on the skin.

pain