Module RomanNumbers {
      flush  ' empty current stack
      gosub Initialize
      document Doc$
      while not empty
            read rom$
            print rom$;"=";RomanEval$(rom$)
            Doc$=rom$+"="+RomanEval$(rom$)+{
            }
      end while
      Clipboard Doc$
      end
Initialize:
      function RomanEval$(rom$) {
            Flush
            ="invalid"
            if filter$(rom$,"MDCLXVI")<>"" Then Exit
            \\ "Y" is in top of stack
            Push "CM", "MD", "Q"
            Push "CD", "MD","W"
            Push "XC", "DL", "E"
            Push "XL", "X","R"
            Push "IX","V","T"
            Push  "IV","I","Y"
            \\ stack flush to doublerom
            doublerom=[]
            \\  "M" is in top of stack
            Data "M", 1000, "Q",900
            Data "D", 500,"W", 400
            Data "C",100,"E",90
            Data "L",50,"R", 40
            Data "X", 10, "T", 9
            Data "V", 5, "Y", 4, "I",1
            \\ stack flush to singlerom
            singlerom=[]
            acc=0
            value=0
            count=0
            stack doublerom {
                  if empty then exit
                  read rep$,exclude$,cc$
                  i=instr(rom$,cc$)
                  if i >0 then
                        tmp$=mid$(rom$,i+2)
                        L=Len(tmp$)
                        if L>0 then if Len(filter$(tmp$, exclude$))<>L then rom$="A": exit
                        if Instr(rom$,mid$(rom$,i,1))<i then rom$="A": exit
                        insert i,2 rom$=rep$  ' replace at pos i with rep$ and place a space to i+1
                  end if
                  loop
            }
            rom$=filter$(rom$," ") ' remove spaces if exist

            stack singlerom {
                  if empty then exit
                  read cc$, value
                  count=0
                  while left$(rom$,1)=cc$
                         insert 1, 1 rom$=""
                         count++
                         acc+=value
                  end while
                  if count>3 then exit
                  loop
            }
            if len(rom$)>0  or count>3 Else
                  =Str$(acc,1033)
            end if
      }
      data "MMMCMXCIX", "LXXIIX", "MMXVII", "LXXIX", "CXCIX","MCMXCIX","MMMDCCCLXXXVIII"
      data "CMXI","M","MCDXLIV","CCCC","IXV", "XLIXL","LXXIIX","IVM"
      data "XXXIX", "XXXX", "XIXX","IVI", "XLIX","XCIX","XCIV","XLVIII"
      return
}
RomanNumbers