regex, cut 1st word from a string

Hi.
I'm trying to cut 1st word from a string in Kettle.
I'm using Regex evaluation and my reg. expression is: (?:^|(?:\\s))(\w+)
I'm learing about regex from here: http://rubular.com/r/rJtPbvUEwx and it works here.
When I use it in Kettle it does not work.
Does someone know why? (Or is there some easier option (step) to cut 1st word from string?)
Thanks