Resharper File Template - Extract part of the current file name

I'm trying to create a "handler" file template so that when I enter a name of "GetBlogRequestHandler" the following will be generated:

public class GetBlogRequestHandler : IHandle<GetBlogRequest, GetBlogResponse> {

}

The problem is that given then following template

public class %VARIABLE%RequestHandler : IHandle<%VARIABLE%Request, %VARIABLE%Response> {

}

I want to be able to set the macro for

%VARIABLE%

RequestHandler