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

Example Input: Titanium is found in column _ along with chemically similar zirconium, hafnium, and thorium.
Example Output: four

Example Input: Lions stand between _ and a half and four feet tall at the shoulder.
Example Output: three

Example Input: Photons have _ mass or charge, and they travel in straight lines.
Example Output:
no