What's a Regex pattern for 3 consecutive digits increasing or decreasing

Question

I need a regex pattern to match a sequence of 3 consecutive digits in a string that are consecutively increasing or decreasing.

For example:

These strings should match (xxx123xxx, 789xxxxxx, xxxxxx987, xxxxxx432)

These strings should not match (xxxxxx454, 333xxxxxx, xxx429xxx)

Answer 1

There is no other way than listing them:

(012|123|234|345|456|567|678|789|987|876|765|654|543|432|321|210)