You are given an English sentence with a blank, and you need to predict the missing word. After completing, the whole sentence should be gramatically correct and non-ambiguous.

Example Input: she said she hadn't time to get sick watching to see that i didn't fall overboard she said she never saw the beat of me for prowling about but if it kept her from being seasick it's a mercy i did prowl isn't it and i wanted to see everything that was to be seen on that boat ____ i didn't know whether i'd ever have another opportunity
Example Output: because

Example Input: the road part of which had been cut so deeply into the soft soil that the banks fringed ____ blooming wild cherry trees and slim white birches were several feet above their heads the child put out her hand and broke off a branch of wild plum that brushed against the side of the buggy
Example Output: with

Example Input: for the last month this wretched house had presented the gloomy appearance of a lazaretto infected with the plague some of the apartments were closed within and without ____ shutters were only opened to admit a minute's air showing the scared face of a footman
Example Output:
the