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: Color codes are ____ digit combinations of letters and numbers that correspond to a specific color.\Question: Choose the right answer from options given a) six b) eight c) seven d) one

Output: a


Input: Consider Input: Unequal cleavage can occur in ____ ways.\Question: Choose the right answer from options given a) two b) seven c) three d) ten

Output: a


Input: Consider Input: People change when ____ different cultures interact.\Question: Choose the right answer from options given a) six b) two c) eight d) no


Output: b