anchor.diff:          "GESTEP"; "GROWTH"; "HEX2BIN"; "HEX2DEC"; "HEX2OCT"; "HOUR"; "HYPERLINK"; "IMABS"; "IMAGINARY"; "IMARGUMENT"; "IMCONJUGATE"; "IMCOS"; "IMCOSH"; "IMCOT"; "IMCSC";
           "IMCSCH"; "IMEXP"; "IMLN"; "IMLOG10"; "IMLOG2"; "IMREAL"; "IMSEC"; "IMSECH"; "IMSIN"; "IMSINH"; "IMSQRT"; "IMTAN"; "INDEX"; "INDIRECT"; "INFO"; "INT";  "IRR";
           "ISBLANK"; "ISERR"; "ISERROR"; "ISEVEN"; "ISFORMULA"; "ISLOGICAL"; "ISNA"; "ISNONTEXT"; "ISNUMBER"; "ISODD"; "ISREF"; "ISTEXT"; "ISO.CEILING"; "ISOWEEKNUM";  "JIS";
  -        "LEFT"; "LEFTB"; "LEN"; "LENB"; "LINEST"; "LN"; "LOG"; "LOG10"; "LOGEST"; "LOWER";
  -        "MEDIAN"; "MINUTE"; "MODE.MULT"; "MAX"; "MAXA"; "MDETERM"; "MDETERM"; "MODE.SNGL"; "MIN"; "MINA"; "MINVERSE"; "MODE"; "MULTINOMIAL"; "MUNIT";
  +        "LEFT"; "LEFTB"; "LEN"; "LENB"; "LINEST"; "LN"; "LOG"; "LOG10"; "LOGEST"; "LOWER"; "MDETERM"; 
  +        "MEDIAN"; "MINUTE"; "MDETERM"; "MDETERM"; "MINVERSE"; "MONTH"; "MUNIT";
           "N"; "NORMSDIST"; "NORM.S.INV"; "NORMSINV"; "NOT"; "NUMBERVALUE"; 
           "OCT2BIN"; "OCT2DEC"; "OCT2HEX"; "ODD"; "OR"; 
           "PHI"; "PHONETIC"; "PRODUCT"; "PROPER";
  
positive.code:         "FORECAST.LINEAR"; "FORECAST.ETS.CONFINT"; "FORECAST.ETS.STAT"; "FV"; "GAMMA.INV"; "GAMMAINV"; "GROWTH"; "HLOOKUP";
          "IF"; "INDEX"; "LINEST"; "LOGEST"; "LOGINV"; "LOGNORMDIST"; "LOGNORM.INV"; "LOOKUP";
          "MATCH";
          "MEDIAN"; "MIRR"; "MODE.MULT"; "MAX"; "MAXA"; "MAXIFS"; "MID"; "MIDB"; "MODE.SNGL"; "MIN"; "MINIFS"; "MINA"; "MODE"; "MULTINOMIAL";
          "NEGBINOMDIST"; "NETWORKDAYS"; "NETWORKDAYS.INTL"; "NORM.INV"; "NORMINV"; "NPER"; "NPV"; "NUMBERVALUE"; 
          "OFFSET"; "OR";
          "PDURATION"; "PERCENTRANK.EXC"; "PERCENTRANK.INC"; "PERCENTRANK"; "PMT"; "POISSON.DIST"; "POISSON"; "PROB"; "PRODUCT"; "PV"; 
  
negative.code: 
      let Arity6FunctionName: P<string> = ArityNFunctionNameMaker 6 ["ACCRINT"; "AMORDEGRC"; "AMORLINC"; "BETA.DIST";
          "CUMIPMT"; "CUMPRINC"; "DURATION"; "FORECAST.ETS"; "FORECAST.ETS.CONFINT"; "FORECAST.ETS.STAT"; "IPMT"; 
          "MEDIAN"; "MDURATION"; "MDURATION"; 
          "NPV"; 
          "OR";
          "PPMT"; "PRICE"; "PRODUCT"; 
  