The next four figures are {HEAD ~ stacked area charts} showing {TAIL ~ the difference} from a left to right printed swath and an adjacent right to left printed swath 
showing
The next four figures are { HEAD ~ stacked area charts } showing { TAIL ~ the difference } from a left to right printed swath and an adjacent right to left printed swath
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH