goto 'LAST'.$len;
	LAST11: $c+= $k[10] <<24;
	LAST10: $c+= $k[9]  <<16;
	LAST9:  $c+= $k[8]  <<8;
	LAST8:  $b+= $k[7]  <<24;
	LAST7:  $b+= $k[6]  <<16;
	LAST6:  $b+= $k[5]  <<8;
	LAST5:  $b+= $k[4];
	LAST4:  $a+= $k[3]  <<24;
	LAST3:  $a+= $k[2]  <<16;
	LAST2:  $a+= $k[1]  <<8;
	LAST1:  $a+= $k[0];
	LAST0: