How do you typeset font characters by their ansi code number, ex. Alt+33 (21h) ?

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Best,
Alan

Ubuntu 8.04 Hardy Heron (Desktop)
  * ConTeXt  ver: 2008.09.16 19:49 MKIV  fmt: 2008.9.20  int: english/english  (ConTeXt minimals installation)
  * texexec --lua foo