Use Arg request, response
response~content_type = "text/plain"
Say "count="request~cookie()
Say "first="request~cookie("first")
Say "second="request~cookie("second")
-- "0" must not be reported as an existing name: the counters live
-- outside the stem key space (call this with ?x=1 so that arguments
-- and cookies are both present and the probe is not vacuous).
Say "zeroarg="request~arg("0","Exists")
Say "zerocookie="request~cookie("0","Exists")
