The pedestals in {HEAD ~ the second row} may be offset from the pedestals in {TAIL ~ the first row} 
The pedestals in { HEAD ~ the second row } may be offset from the pedestals in { TAIL ~ the first row }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL