{HEAD ~ The low pass filter} 708 has {TAIL ~ a cut} off frequency of 2 kHz 
has
{ HEAD ~ The low pass filter } 708 has { TAIL ~ a cut } off frequency of 2 kHz
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH