flowchart LR
  Start[Start]
  Stop[Stop]
  Start --> Dollar([<tt>$</tt>])
  Dollar --> PreLoop(( ))
  PreLoop --> DecDigit([<tt>0</tt>..<tt>9</tt>])
  PreLoop --> UpperHex([<tt>A</tt>..<tt>F</tt>])
  PreLoop --> LowerHex([<tt>a</tt>..<tt>f</tt>])
  DecDigit --> PostLoop(( ))
  UpperHex --> PostLoop
  LowerHex --> PostLoop
  PostLoop --> PreLoop
  PostLoop --> Stop