One color map is used for left to right printing and {HEAD ~ the second color map} is used for {TAIL ~ printing} right to left 
One color map is used for left to right printing and { HEAD ~ the second color map } is used for { TAIL ~ printing } right to left
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH