Given the task definition, example input & output, solve the new input case.
In this task, you are given a date in a particular format and you need to convert to another format. If given format is "dd/mm/yyyy" then convert to "mm/dd/yyyy". If given format is "mm/dd/yyyy" then convert to "dd/mm/yyyy".
Example: 10/05/1847, input_format=dd/mm/yyyy
Output: 05/10/1847
The month(mm) is 05, day(dd) is 10 and year(yyyy) is 1847, so the output should be 05/10/1847.

New input case for you: 12/08/1857, input_format=mm/dd/yyyy
Output:
08/12/1857