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:
Cigarette smokers are ____ times more likely to die of lung cancer than nonsmokers.\Question: Choose the right answer from options given a) ten b) six c) four d) nine

Ex Output:
a


Ex Input:
Nymphs emerge in ____ to seven days and flatten themselves against the leaf to feed.\Question: Choose the right answer from options given a) one b) five c) nine d) two

Ex Output:
b


Ex Input:
Rogue waves can occur on relatively calm seas with ____ storms for hundreds of miles.\Question: Choose the right answer from options given a) three b) no c) six d) five

Ex Output:

b