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.

Q: Sentence1: Sex hormones are chemical messengers that control sexual development and reproduction. 
Sentence2: Androgens are male sex hormones.

A: Sex
****
Q: Sentence1: Most bryophytes are small. 
Sentence2: Most in the same group as mosses are small.

A: small
****
Q: Sentence1: Cold vinegar relieves sunburn. 
Sentence2: Exposure to ultraviolet light can be relieved with cold vinegar.

A:
Cold
****