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

Example Input: Pharmacists dispense nearly _ billion prescriptions a year.
Example Output: three

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

Example Input: Process theology offers _ forms of immortality.
Example Output:
two