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.

Ex Input:
Sentence 1:The plan would allow passengers to go directly from the bus or tram platforms through an underground pedestrian walkway and escalators . Sentence 2:However , the construction cost of 3 million rubles ( 1988 value ) prevented the plan from being implemented .

Ex Output:
however


Ex Input:
Sentence 1:Albie wakes in the night to go to the bathroom . Sentence 2:But when he gets there , he finds that the bathroom fixtures have been removed .

Ex Output:
but


Ex Input:
Sentence 1:Traditionally they are filled with red jelly and topped with sugar icing . Sentence 2:However , many other varieties exist , the more expensive ones being filled with dulce de leche .

Ex Output:

however