Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.
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Question: Substance abusers have ____ hundred percent higher medical costs and benefits.

Answer: three


Question: Acoustic instruments consist of ____ main parts neck, top, back and sides.

Answer: four


Question: All hairs have a life expectancy of ____ to six years.

Answer:
three