instruction:
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.
question:
Female dogs come into heat every ____ months or so.
answer:
six


question:
ATMs are expensive machines with an average useful life of ____ to fifteen years.
answer:
ten


question:
Most people remove ashes every two to ____ weeks.
answer:

three