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