the file manual.txt contains special mappings not included in the
unihan database. The first 116 entries are taken from 

   冯寿忠,“非对称繁简字”对照表, 《语文建设通讯》1997-9第53期.
   /http://www.yywzw.com/jt/feng/fengb01.htm

The rest are added by me after examining the conversion results.

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