One such fuel processor is a steam reformer which produces {HEAD ~ purified hydrogen} from a carbon containing feedstock and {TAIL ~ water} 
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One such fuel processor is a steam reformer which produces { HEAD ~ purified hydrogen } from a carbon containing feedstock and { TAIL ~ water }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL