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: or would have been cheerful if it had not been so painfully clean as to give it something of the appearance of an unused parlor its windows looked east and west through the west one looking out on the back yard came a flood of mellow june sunlight but the east ____
Example Output: one

Example Input: chapter two matthew cuthbert is surprised matthew cuthbert and the sorrel mare jogged comfortably over the eight miles to bright river it was a ____ road running along between snug farmsteads with now and again a bit of balsamy fir wood to drive through
Example Output: pretty

Example Input: was ascending the ____ leading to debray's apartments
Example Output:
stairs