Such amounts are dependent on other variables, and may be varied as desired by using {HEAD ~ the input device} of {TAIL ~ the controller} 
Such amounts are dependent on other variables , and may be varied as desired by using { HEAD ~ the input device } of { TAIL ~ the controller }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL