- Character Class - Metacharacters
- ^ Negation (only when 1st character)
- - Range (except when 1st character) Note: . is literal in a Character class.
/p[^aeiouAEIOU][a-eA-E]r/ encipher intercepter atmospHere APPARENT
/p[^aeiouAEIOU][a-eA-E]r/ encipher intercepter atmospHere APPARENT