{TAIL ~ The first input signal} is applied to a base or gate of the second transistor with {HEAD ~ regard} to said reference point 
{ TAIL ~ The first input signal } is applied to a base or gate of the second transistor with { HEAD ~ regard } to said reference point
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH