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: Blood pH may become unbalanced if the rate of breathing is too fast or too slow. 
Sentence2: If Someone Is Hyperventilating Hyperventilation is caused by breathing too deeply, too fast.

Output: breathing


Input: Consider Input: Sentence1: Secondary accidents are a major problem under driving conditions of reduced visibility. 
Sentence2: Bad weather increases the risk of car accidents.

Output: Secondary


Input: Consider Input: Sentence1: a plant requires nutrients to grow. 
Sentence2: Nutrients are naturally present in the soil and are found as either minerals or elements.


Output: nutrients