{TAIL ~ a first adder} configured to modulo add the A register value and an MD5 pre adder value, wherein the MD5 pre adder value comprises the modulo sum of {HEAD ~ an MD5 message segment} and an MD5 constant value 
{ TAIL ~ a first adder } configured to modulo add the A register value and an MD5 pre adder value , wherein the MD5 pre adder value comprises the modulo sum of { HEAD ~ an MD5 message segment } and an MD5 constant value
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH 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 HEAD HEAD OTH OTH OTH OTH OTH