{HEAD ~ A monitor unit} which can monitor equivalent operation of the processing sets can also include {TAIL ~ the mutex ordering mechanism} 
include
{ HEAD ~ A monitor unit } which can monitor equivalent operation of the processing sets can also include { TAIL ~ the mutex ordering mechanism }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL