Expect with tcl/tk

hai all,
i have an tcl script in which i have been reading the DUT Command prompt of an cisco switch as
DUT Command Prompt : cisco*
and running the test case of stp now the problem is if i have given any blank space in between the cisco or at the startup then the Expect is not identifying the DUT command prompt . is there any solution in expect so that if any blank space comes then further process can be carry on not specifying that DUT Command prompt not recognizable

Regards,
Sanju