title: Generate alphanumeric sequence in Ruby
body: <p>How would I go about generating a sequential alphanumeric string? </p>
  
  <p>Each string should only be 8 characters.</p>
  
  <p>The characters possible for each position are:</p>
  
  <pre><code>["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "B", "C", "D", "F", "G", "H", "J", "K", "L", "M", "N", "P", "Q", "R", "S", "T", "V", "W", "X", "Y", "Z"]
  </code></pre>
  
  <p>Also, If possible I would like to choose the starting point of the sequence.</p>
  
  <p>For example:</p>
  
  <pre><code>00000001
  00000002
  00000003
  00000005
  ...
  0000L3FH
  0000L3FJ
  0000L3FK
  0000L3FL
  0000L3FM
  0000L3FN
  0000L3FP
  ...
  0000L4FP
  0000L4FQ
  0000L4FR
  0000L4FS
  ...
  0000M000
  0000M001
  0000M002
  </code></pre>