If contention is noted between the system inputs to the pin, and outputs from the device to the pin, {HEAD ~ contention error notices} are provided to {TAIL ~ the user} 
are provided to
If contention is noted between the system inputs to the pin , and outputs from the device to the pin , { HEAD ~ contention error notices } are provided to { TAIL ~ the user }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL