t non-alphanumeric character)
  \L         call pcre_get_substringlist() after a successful match
  \M         discover the minimum MATCH_LIMIT and MATCH_LIMIT_RECURSION settings
  \N         pass the PCRE_NOTEMPTY option to <b>pcre_exec()</b> or <b>pcre_dfa_exec()</b>
  \Odd       set the size of the output vector passed to <b>pcre_exec()</b> to dd (any number of digits)
  \P         pass the PCRE_PARTIAL option to <b>pcre_exec()</b> or <b>pcre_dfa_exec()</b>
  \Qdd       set the PCRE_MATCH_LIMIT_RECURSION