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: Most bryophytes are small. 
Sentence2: Most in the same group as mosses are small.

Output: small


Input: Consider Input: Sentence1: healing requires rest. 
Sentence2: healing requires time.

Output: healing


Input: Consider Input: Sentence1: Glucose is used for energy by the cells of most organisms. 
Sentence2: carbohydrates are converted into glucose.


Output: Glucose