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: Heat and temperature are the same. 
Sentence2: a thermometer is used to measure heat.

Output: Heat


Input: Consider Input: Sentence1: Climate refers to weather over a long period of time. 
Sentence2: weather is generally described in terms of temperature and moisture.

Output: long


Input: Consider Input: Sentence1: Boiling is evaporation that occurs theroughout a liquid. 
Sentence2: boiling can be used for separating a solute from a solvent in a solution.


Output: Boiling