The upper portion and the lower portion of the first side and the second side have {HEAD ~ a plurality} of pegs and {TAIL ~ holes} to facilitate the coupling of the first side to the second side 
of
The upper portion and the lower portion of the first side and the second side have { HEAD ~ a plurality } of pegs and { TAIL ~ holes } to facilitate the coupling of the first side to the second side
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH