This property defines the Unicodes which are used to indicate positions between characters that extend a preceding numeric character
Characters like _, ,‿, etc. are listed under Exclamation Word Break.
11 Characters are present in Exclamation Word Break starting with the Unicode point U+005F that represents the character _.
Currently, as per latest version 15.0.0, Unicode supports 19 number of Word Break. Here are a few examples - Carriage Return,Double Quote,Exclamation, etc.