Definition: The task is to read a passage and convert numbers in their text forms into digit forms. The text numbers can be used to represent Quantity, Dates and Time, Addresses or Positions.
Input: In September, the White House decided to permit further visits by the President and extended the trip to run from the afternoon of November twenty one
Output:
In September, the White House decided to permit further visits by the President and extended the trip to run from the afternoon of November 21