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').

Input: Consider Input: All quetzals have ____ legs.\Question: Choose the right answer from options given a) four b) zero c) eight d) ten

Output: a


Input: Consider Input: Most children improve in three to ____ days.\Question: Choose the right answer from options given a) seven b) six c) four d) ten

Output: a


Input: Consider Input: ACE inhibitors have ____ peculiar side effects.\Question: Choose the right answer from options given a) no b) two c) zero d) one


Output: b