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#original (for the 1st column):
$y = 0;
...
for ($x = 0; $x < 15; $x++) {
    push @num, $ips[$x][$y];
}

for ($x = 0; $x < 15; $x++) {
    push @newips, $ips[$x][0];
    push @num, $ips[$x][1];
}