How to add a white space between two strings in xslt

[Mythos_vbulletin3_import35577]

I have one xml tag:\[code\]<sub12>\\SANORS01\BTTransfer$\8dc917806140000.TIF8dc917806140001.TIF</sub12>\[/code\]The name of the tag is \[code\]sub12\[/code\].You can see there are two file names, \[code\]8dc917806140000.TIF8dc917806140001.TIF\[/code\]i need a whitespace between \[code\]8dc917806140000.TIF 8dc917806140001.TIF\[/code\].Please give a solution based on XSLT 1.0.Thanks a ton in advance.