Generating wordlist using specific charlist with exclusions

[royce]

Be sure to also do the math to calculate how many password candidates these rules will eliminate compared the speed of your attack. Some of the rules you're describing won't reduce the keyspace very much, and wouldn't be worth the effort compared to to expected time to exhaust the keyspace.

In other words, some rules that would be implemented by a specialized generator are probably only worth the effort if it's a pretty slow hash.