Given a relatively simple CSS:
Depending on what you want to see exactly, you can use a combination of hyphen, soft hyphen, and/or zero width space.
On a soft hyphen, your browser can word-break (adding an hyphen). On a zero width space, your browser can word break (without adding anything).
Thus, if your code is something like :
111111222222-333333444444-555555
then your browser will show this with no word-break :
1111112222222-33333334444444-5555555
and this will every possible word-break :
111111-
222222-
-333333
444444-
555555
Just pick up the option you need. In your case, it may be the one between 4s and 5s.