How to use "%" in value, for a @FileName variable with chaning name on the file. (SSIS)

Hi,

I have Filenames with names ABC1501, ABC1502, ABC1503... The last 4 numbers are for years and month and will change every month.

I want to set the value for a variable to "ABC%" but it doesn't work. 

Is it any other symbols that works in SSIS?

I'm using the variable in a script task.

Best regards

Baden