The -r option allows the specification of the regex worth in lieu of the default sample selection. If, as an example, I demanded that my address include all lowercase letters but I do not care if the "D" in "David" is uppercase or not, I could use vanitygen. BitcoinVanityAddress.com is https://elliottnmkgb.shotblogs.com/this-article-is-under-review-41963699