d) using {HEAD ~ the endoscope} to bend the working end of the flexible tube to move the second jaw against patient tissue of the esophagus or {TAIL ~ the stomach}; and 
d ) using { HEAD ~ the endoscope } to bend the working end of the flexible tube to move the second jaw against patient tissue of the esophagus or { TAIL ~ the stomach } ; and
OTH OTH 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 TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH