In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Ex Input:
Packs usually have fewer than _ wolves.

Ex Output:
ten


Ex Input:
Many Asian countries deny entry to travelers whose passports are valid for less than _ months.

Ex Output:
six


Ex Input:
Carbon is formed by a rare collision of _ helium nuclei.

Ex Output:

three