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.

Input: Consider Input: Sentence 1:X-rays have been detected from V473 Lyrae during a survey looking for x-rays from young main sequence companions to Cepheid variables . Sentence 2:However , the x-rays in this case appear to originate from the Cepheid itself , not from the companion .

Output: however


Input: Consider Input: Sentence 1:Big cats that hunt nocturnally , such as lions , leopards and tigers , had never been extensively filmed doing so before . Sentence 2:But the latest infrared technology revealed behaviour that had previously been guessed at from evidence discovered the next day .

Output: but


Input: Consider Input: Sentence 1:Under British law a birth aboard a British aircraft is considered to have taken place in Great Britain . Sentence 2:However , if the aircraft is over French territory at the time , the birth is considered under French law to have taken place in France .


Output: however