Alternatively, {HEAD ~ the chewing gum} may contain combinations of sugar and {TAIL ~ sugarless sweeteners} 
Alternatively , { HEAD ~ the chewing gum } may contain combinations of sugar and { TAIL ~ sugarless sweeteners }
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL