The contents of the B register is then shifted to {TAIL ~ the right} by {HEAD ~ the proper number} of places so that the exponent difference between the numbers in the A and B registers is zero.  
The contents of the B register is then shifted to { TAIL ~ the right } by { HEAD ~ the proper number } of places so that the exponent difference between the numbers in the A and B registers is zero .
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH