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