{HEAD ~ The custom server} performs test cases and saves {TAIL ~ test results} of the test case, which the custom server communicates back to the execution server 
saves
{ HEAD ~ The custom server } performs test cases and saves { TAIL ~ test results } of the test case , which the custom server communicates back to the execution server
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH