{TAIL ~ The method} 14 further comprising generate a least significant region of the output mask responsive to: a third bit of the first mask, the third bit corresponding to the least significant region; and {HEAD ~ the bits} of the second mask 
{ TAIL ~ The method } 14 further comprising generate a least significant region of the output mask responsive to : a third bit of the first mask , the third bit corresponding to the least significant region ; and { HEAD ~ the bits } of the second mask
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