I have to process tags in audiobooks, to remove not a certain number of chars in the beginning of the string (this I know), but everything from the beginning of the string to the next full stop and a space after it.
This is the name of the book. Part 1 (have to remove everything BEFORE letter P in Part 1)
This is shorter. Chapter 1 (have to remove everything BEFORE letter C in Chapter)
Here we see, that the length of the portions I want to remove is different, so the RegEx must not think about number of chars to remove, but think about the first full stop and a space after it.