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: whence you got a glimpse of the bloom white cherry trees in the left orchard and nodding slender birches down in the hollow by the brook was greened over by ____ tangle of vines here sat marilla cuthbert when she sat at all always slightly distrustful of sunshine
Example Output: a

Example Input: ____ but i pity him that's what so said missus rachel to the wild rose bushes out of the fulness of her heart
Example Output: my

Example Input: whence you got a glimpse of the bloom white cherry trees in the left orchard and nodding slender birches down in the hollow by the brook was greened over by ____ tangle of vines here sat marilla cuthbert when she sat at all always slightly distrustful of sunshine
Example Output:
a