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: Consider Input: Sentence1: Hurricanes have wind speeds of at least 74 mph. 
Sentence2: anemometers can measure hurricanes.

Output: Hurricanes


Input: Consider Input: Sentence1: plant requires seed dispersal for reproduction. 
Sentence2: plants are pollinated by birds.

Output: plant


Input: Consider Input: Sentence1: a flashlight requires a source of electricity to produce light. 
Sentence2: a flashlight requires batteries to produce light.


Output: flashlight