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