[xsl] sorting information from multiple files

["james walker" <jameswalkerandy@xxxxxxxxxxx>]

If i have 4 xml files which i am selectively pulling information from, is 
there anyway i can sort this selective information in ascending order. E.g. 
i have 4 for-each loops which gather specific info from each file:
<xsl:for-each select="document(http:..doc1..)"></xsl:for-each>
<xsl:for-each select="document(http:..doc2..)"></xsl:for-each>
<xsl:for-each select="document(http:..doc3..)"></xsl:for-each>
<xsl:for-each select="document(http:..doc4..)"></xsl:for-each>

if the info gathered was letters of the alphabet and doc1 contained "xyz", 
doc2 contained "abc", doc3 contained "hut" and doc4 contained "jwr", the 
output using t he foreach loops above would be:
x
y
z
a
b
c
h
u
t
j
w
r
however i wanted the result
a
b
c
h
j
r
t
u
w
x
y
z
is this possible?

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