Generally, said fuel cell is a net producer of {HEAD ~ water}, and said fuel processor 12 is {TAIL ~ a net consumer} of water 
Generally , said fuel cell is a net producer of { HEAD ~ water } , and said fuel processor 12 is { TAIL ~ a net consumer } of water
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH