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