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:
Cyclic neutropenia tends to occur every three weeks and last ____ to six days at a time.\Question: Choose the right answer from options given a) six b) four c) five d) three

Ex Output:
d


Ex Input:
Nightmares happen frequently in childhood, especially between the ages of ____ and six.\Question: Choose the right answer from options given a) three b) eight c) no d) ten

Ex Output:
a


Ex Input:
Violence is a part of society in that there are ____ societies without some level of violence.\Question: Choose the right answer from options given a) eight b) six c) four d) no

Ex Output:

d