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:
Phylogenetic analyses confirm ____ mitochondrial mallard clades.

Ex Output:
two


Ex Input:
Titanium is found in column ____ along with chemically similar zirconium, hafnium, and thorium.

Ex Output:
four


Ex Input:
Atherosclerotic plaques cause clinical disease by ____ mechanisms.

Ex Output:

three