<?

$toptracks = array_map("trim", file("toptracks.tsv"));
$playlist = array_map("trim", file("playlist.tsv"));

foreach ($toptracks as $tt)
	foreach ($playlist as $p)
		if (strstr($p, $tt))
			$arr[trim($tt)][]=trim($p);

foreach ($arr as $track => $scd)
	foreach ($scd as $cd)
		$suck=explode("\t", $cd) and $cds[$suck[0]][] = $track;

foreach ($cds as $keh => $val)
	$cdsnum[$keh] = count($val);

array_multisort($cdsnum, SORT_DESC, $cds);

print_r($cds);