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