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: When the strings on a guitar vibrate, they transmit their vibrations to the saddle. 
Sentence2: plucking vibrates the saddle.

saddle