Given the task definition and input, reply with output. 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.

Oswald went on October thirty one, to the American Embassy to renounce his U.S. citizenship.

Oswald went on October 31, to the American Embassy to renounce his U.S. citizenship.