How many ways are there to reply to a "Thank you" and an 'I'm sorry'?

How many ways are there to reply to a ‘Thank you’ and an ‘I’m sorry’?

There may be hundreds of ways, Theresa. It depends on the context and register as well as individual preference.

Hi,

The one expression that seems to have stifled all the others and is probably the most despised is;

No problem

Alan