Python 3 Help!!! I know my user is gonna input some hex numbers. For example, let's say user inputted "e111, e222, e1234" (it could be more than 3 rows)

I want to take that input and print out something like this: e111 e222 e1234 xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx

I don't know how many hex user is gonna input. If the user inputs nothing I want my program to print the following: xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx xxxx

To be specific, My row and column has to be 5x4. And it should print out exactly as shown above. User inputs will replace "xxxx".