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.

Ex Input:
Sentence1: Translation reads the genetic code in mRNA and makes a protein. 
Sentence2: Nucleotide sequences are read in mRNA and a protein is made.

Ex Output:
mRNA


Ex Input:
Sentence1: Climate Forests stabilize climate. 
Sentence2: forests stabilize what is generally described in terms of temperature and moisture.

Ex Output:
Forests


Ex Input:
Sentence1: Climate is the average weather in an area over a long period of time. 
Sentence2: Bloom time depends on the climate in an area.

Ex Output:

Climate