how to split the stirng(02-02-2009 13:24:27)

["malayappa2000" <malayappa@xxxxxxxxxxxxxxxxxx>]

hi guys

we are the fallowing sting

01-31-2009 13:24:27
 we need to split sec in the above stirng i.e we need out put in the
fallowing formta

01-31-2009 13:24  

provide some help ho to achive this.