Given the task definition, example input & output, solve the new input case.
The task is reading a paragraph containing numbers as digits. The digits can be used to represent Quantity, Dates and Time, Addresses or Positions. Convert the digits into their text equivalents. If a number has a prefix, postfix or punctuation preserve it in the text equivalent. 100000 is translated as hundred thousand, Roman numerals are also translated. If multiple numbers are present convert all instances.
Example: The boy placed 13th in class.
Output: The boy placed thirteenth in class.
Here the number represents the position of the person, and hence we use the 'th' form of the number.

New input case for you: by paying in a genuine bill of Messrs. Rothschilds' for £4500, which was duly discounted.
Output:
by paying in a genuine bill of Messrs. Rothschilds' for forty five hundred pounds, which was duly discounted.