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

Input: Consider Input: Plazas have _ accumulations of rubbish but are covered with even layers of mud bricks and plaster.

Output: no

Input: Consider Input: Calves grow quickly and are weaned from their mothers in only _ to four months.

Output: three

Input: Consider Input: Cognitive therapy is a time-limited treatment lasting _ to four months.
Output: three