Appropriate registers are provided to store {HEAD ~ the numbers} which represent {TAIL ~ the subtrahend} and minuend of a subtraction operation 
represent
Appropriate registers are provided to store { HEAD ~ the numbers } which represent { TAIL ~ the subtrahend } and minuend of a subtraction operation
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH