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<title>Guessing Game</title>
<h1>Welcome to the Guessing Game!</h1>
Guess the secret combination below, and if you get it right,
you'll get the password to the next level!
$filename = 'secret-combination.txt';
if (isset($attempt)) {
$combination = trim(file_get_contents($filename));
if ($attempt === $combination) {
echo "<p>How did you know the secret combination was" .
" $combination!?</p>";
$next = file_get_contents('level02-password.txt');
echo "<p>You've earned the password to the access Level 2:" .
" $next</p>";
} else {
echo "<p>Incorrect! The secret combination is not $attempt</p>";
<form action="#" method="GET">
<p><input type="text" name="attempt"></p>
<p><input type="submit" value="Guess!"></p>
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