Therefore, even if {TAIL ~ a main course box} is out of {HEAD ~ order} the data remains in the sub course box 
Therefore , even if { TAIL ~ a main course box } is out of { HEAD ~ order } the data remains in the sub course box
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH