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