Repeated Code

     Subject: format Question
     Message-ID: <pqalftcopgu5addk8tkd0rlnfgujp1pef6@4ax.com>

     ...
     y/A-Za-z/2223334445556667778889990022233344455566677788899900/;
     ...

• I had to grovel over the right side to make sure it was the same thing twice

• Quick! What is the translation of mjd?