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.

Ex Input:
and since sitting and waiting was the only thing to do just then she sat and waited with all her might and main matthew encountered the stationmaster locking up the ticket office preparatory to going home for supper and asked ____ if the five thirty train would soon be along

Ex Output:
him


Ex 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 ____

Ex Output:
one


Ex Input:
debray was occupied in repelling the insinuations of ____ friend who tried to persuade him

Ex Output:

a