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.

Ex Input:
Photons have ____ mass and no electrical charge.

Ex Output:
no

Ex Input:
Rabbits have a total of ____ teeth rather than four, as is characteristic of rodents.

Ex Output:
six

Ex Input:
Trees are a long-term investment that can take up to ____ years to produce.

Ex Output:
six