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:
Chromatography is unique because of ____ reasons.

Ex Output:
three


Ex Input:
Inversions have the classic double loop at meiosis, and have ____ crossovers when heterozygotes.

Ex Output:
no


Ex Input:
Blood is tested to match ____ antigens.

Ex Output:

six