In this task, you are given two sentences in the English language (Sentence 1 and Sentence 2). Your task is to identify the connecting word between the two sentences.

Example Input: Sentence 1:In the above , function ( ) can be called by different threads without any problem . Sentence 2:But , if the function is used in a reentrant interrupt handler and a second interrupt arises inside the function , the second routine will hang forever .
Example Output: but

Example Input: Sentence 1:After a heavy drinking session , Kerry and Smithy slept together . Sentence 2:However , Kerry had no recollection of her night of passion with Smithy and felt guilty for cheating on Cameron .
Example Output: however

Example Input: Sentence 1:The first negative speaker should always make some points in rebuttal at this stage of the speech . Sentence 2:However , such rebuttal should be kept short .
Example Output:
however