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:
Divorce affects one out of every ____ marriages today.

Ex Output:
four

Ex Input:
Pyrimidines contain ____ ring and purines contain two rings.

Ex Output:
one

Ex Input:
Systematists continue to debate the sequence in which the ____ phyla of bryophytes evolved.

Ex Output:
three