wherein {HEAD ~ the another processing engine} being configured to perform another stage of the MD5 process and to output {TAIL ~ an MD5 digest value} 
configured to output
wherein { HEAD ~ the another processing engine } being configured to perform another stage of the MD5 process and to output { TAIL ~ an MD5 digest value }
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL