After {HEAD ~ the blank} 21 is die cut from {TAIL ~ the sheet} of cardboard, the left and right sides of the blank 21 are rotated 180 degrees toward each other about fold lines 22 so that edge 23 overlaps glue flap 24  
is die cut from
After { HEAD ~ the blank } 21 is die cut from { TAIL ~ the sheet } of cardboard , the left and right sides of the blank 21 are rotated 180 degrees toward each other about fold lines 22 so that edge 23 overlaps glue flap 24
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH