%aHash = ();
while( <BASE> ) {
    chomp;
    @vals = split /\t/;
    if(exists $aHash{$vals[1]}){
	$aHash{$vals[1]} = $aHash{$vals[1]} . "," . $vals[0];
    }else{
        $aHash{$vals[1]} = $vals[0];
    }
}
close BASE;

$/ = "//";

while( <DATA> ) {
    $locusid = "NA";
    @lines = split("\n");

    foreach $x (@lines) {
        if( $x =~ /^LOCUSLINK/ ) {
	    @temp = split/\s+/, $x;
	    $locusid = $temp[1];
	    next;
	}
	if( $x =~ /^SEQUENCE/ ) {
	    @tmp = split/\s+/, $x;
	    $tmp[1] =~ s/ACC=(.*);/$1/;

	    if(exists $aHash{$tmp[1]}){
		@affys = split/,/, $aHash{$tmp[1]};
		foreach $x (@affys){
		    print OUT $x, "\t", $locusid, "\n";
		} 
	    }
	    next;
   	}
    }
}

close DATA;