asp两个数组怎么进行比较，剔除相同，保留不同

<%
arra = "15,19,210,22,45,6,55"
arrb = "368,111,20,501,22,66,90,55,10"
 
arra = Split(arra, ",")
arrb = Split(arrb, ",")
Set dic = CreateObject("Scripting.Dictionary")
For i = 0 To UBound(arra)
    If dic.Exists(arra(i)) Then
        dic.Remove arra(i)
    Else
        dic.Add arra(i), arra(i)
    End If
Next
For i = 0 To UBound(arrb)
    If dic.Exists(arrb(i)) Then
        dic.Remove arrb(i)
    Else
        dic.Add arrb(i), arrb(i)
    End If
Next
arr = dic.Items
Set dic = Nothing
Response.Write Join(arr, ",")
%>

<%
dim a,b,ar,d,i
a = "15,19,210,22,45,6,55"
b = "368,111,20,501,22,66,90,55,10"
ar = split(a & "," & b, ",")
set d = CreateObject("Scripting.Dictionary")
For i = 0 to UBound(ar)
    If d.exists(ar(i)) Then
        d.remove ar(i)
    Else
        d.add ar(i), ar(i)
    End If
Next
ar = d.items
set d = nothing
response.write join(ar, ",")
%>