[xsl] one function call twice for the same variable

I need to call one function for the same variable twice (somethin like
recursive)...
How to do this?


<xsl:variable name="CustomerSignerLName">
          <xsl:call-template name="change">
                        <xsl:with-param name="name_string" select="LNAME"/>
                        <xsl:with-param name="delimiter" select="'-'"/>
         </xsl:call-template>
</xsl:variable>


And once again with the same parameter:
          <xsl:call-template name="change">
                        <xsl:with-param name="name_string" 
select="$CustomerSignerLName"/>
                        <xsl:with-param name="delimiter" select="'-'"/>
         </xsl:call-template>

And twice with another parameter:
          <xsl:call-template name="change">
                        <xsl:with-param name="name_string" 
select="$CustomerSignerLName"/>
                        <xsl:with-param name="delimiter" select="' '"/>
         </xsl:call-template>

          <xsl:call-template name="change">
                        <xsl:with-param name="name_string" 
select="$CustomerSignerLName"/>
                        <xsl:with-param name="delimiter" select="' '"/>
         </xsl:call-template>

How to write it correctly?

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