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: Circumcisions usually heal within ____ to two weeks.\Question: Choose the right answer from options given a) one b) five c) eight d) nine

Output: a


Input: Consider Input: Waves can sometimes reach ____ feet tall, while still being playful and fun.\Question: Choose the right answer from options given a) nine b) eight c) ten d) no

Output: c


Input: Consider Input: Most colorblind animals have ____ sets of opsin genes.\Question: Choose the right answer from options given a) five b) two c) ten d) four


Output: b