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:
Sugar beet is strongly self-sterile setting few or ____ seeds under strict isolation.\Question: Choose the right answer from options given a) three b) no c) five d) nine

Ex Output:
b


Ex Input:
Some skulls show the marks of up to ____ bullets.\Question: Choose the right answer from options given a) five b) three c) eight d) six

Ex Output:
d


Ex Input:
Bears have only about ____ months to build up fat reserves for their long winter hibernation.\Question: Choose the right answer from options given a) no b) six c) nine d) zero

Ex Output:

b