The rules determining what combination of {HEAD ~ characters} constitute {TAIL ~ valid full words} is dependent on the system implementing the search and can vary from system to system based on a variety of factors, including but not limited to the data domains on which the search is performed 
constitute
The rules determining what combination of { HEAD ~ characters } constitute { TAIL ~ valid full words } is dependent on the system implementing the search and can vary from system to system based on a variety of factors , including but not limited to the data domains on which the search is performed
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH