Definition: 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: Sentence1: While a baby is very young, during infancy, co-sleeping is very convenient for feeding schedules. 
Sentence2: Very young babies have the period of most rapid growth after birth.

young