11. :The best passwords involve alphanumeric characters and numbers along with capital and lower-case letters. 12. Each " deck " of cards could contain up to 5.5 MB of alphanumeric characters . 13. Classes and IDs are case-sensitive, start with letters, and can include alphanumeric characters and underscores. 14. The following list is largely limited to non-alphanumeric characters . 15. Does Cluebot pick up instantly on every accidental mistyping of non-alphanumeric characters as potential vandalism? 16. USSD messages are up to 182 alphanumeric characters long. 17. Normally searches ignore non-alphanumeric characters , but regular expressions ( regex ) accept all characters, plus metacharacters. 18. The BBAN must be of a fixed length for the country and comprise case-insensitive alphanumeric characters . 19. Traditionally, filenames allowed only alphanumeric characters , but as time progressed, the number of characters allowed increased. 20. When a section heading contains non-alphanumeric characters , then the corresponding anchor contains this characters somehow encoded.
