dropping said {TAIL ~ activated chemical test pad} in {HEAD ~ the water} in the toilet bowl to come into contact with occult blood in the toilet bowl containing the fecal material to be tested; and 
dropping said { TAIL ~ activated chemical test pad } in { HEAD ~ the water } in the toilet bowl to come into contact with occult blood in the toilet bowl containing the fecal material to be tested ; and
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH