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: information in an organism 's chromosomes cause genetic traits to be passed down to that organism 's offspring. 
Sentence2: information in Man's chromosomes cause genetic traits to be passed down to offspring.

Ex Output:
chromosomes


Ex Input:
Sentence1: All cells share some of the same structures and basic functions. 
Sentence2: Inside the cell is a structure called the nucleus.

Ex Output:
cells


Ex Input:
Sentence1: When the pituitary produces FSH and LH, the ovaries respond by producing eggs. 
Sentence2: Hormones tell the ovaries to produce eggs.

Ex Output:

eggs