Abstract: A method for generating a random string of characters can include the steps of determining a full character set. A full character set can include letters (both upper and lower case), digits, and other characters. Embodiments of a full character set are: the alphabet of one language, adding digits, and multiple alphabets. The method can reduce the full character set to a reduced character set. Reducing the full character set can include one or a number of steps, including removing at least one vowel from the full character set, removing at least one digit from the full character set, removing at least one letter from the full character set based on frequency of use, removing at least one digraph and/or. The random string of characters can be generated using the reduced character set. The random string of characters can be converted to a promotional code.