Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

Ex Input:
Dispassion is a ____ edged sword.\Question: Choose the right answer from options given a) six b) two c) zero d) four

Ex Output:
b


Ex Input:
Most people require roughly seven to ____ hours of sleep a night to stay alert through the day.\Question: Choose the right answer from options given a) eight b) ten c) one d) five

Ex Output:
a


Ex Input:
Men kill and are killed ____ or five times more frequently than women.\Question: Choose the right answer from options given a) one b) nine c) four d) eight

Ex Output:

c