All possible arrangements of {HEAD ~ material} can be used for the purpose, including {TAIL ~ both the front panel} and back panel as well as the two longitudinal wall parts 14 and 15 
All possible arrangements of { HEAD ~ material } can be used for the purpose , including { TAIL ~ both the front panel } and back panel as well as the two longitudinal wall parts 14 and 15
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH