<?php
function tekaTekiTeko($batas) {
    if (!is_int($batas) || $batas < 20) {
        throw new InvalidArgumentException("Parameter batas harus berupa bilangan bulat positif (unsigned integer) dan minimal 20");
    }
 
    for ($i = 1; $i <= $batas; $i++) {
        if ($i % 2 == 0 && $i % 3 == 0 && $i % 5 == 0) {
            echo "TekaTekiTeko\n";
        } elseif ($i % 2 == 0 && $i % 3 == 0) {
            echo "TekaTeki\n";
        } elseif ($i % 2 == 0 && $i % 5 == 0) {
            echo "TekaTeko\n";
        } elseif ($i % 3 == 0 && $i % 5 == 0) {
            echo "TekiTeko\n";
        } elseif ($i % 2 == 0) {
            echo "Teka\n";
        } elseif ($i % 3 == 0) {
            echo "Teki\n";
        } elseif ($i % 5 == 0) {
            echo "Teko\n";
        } else {
            echo $i . "\n";
        }
    }
}
 
try {
    tekaTekiTeko(30);
} catch (InvalidArgumentException $e) {
    echo "Error: " . $e->getMessage() . "\n";
}
 
echo "\n--- Test dengan parameter tidak valid ---\n";
 
try {
    tekaTekiTeko(19);  // Kurang dari 20
} catch (InvalidArgumentException $e) {
    echo "Error: " . $e->getMessage() . "\n";
}
 
try {
    tekaTekiTeko("abc");  // Bukan integer
} catch (InvalidArgumentException $e) {
    echo "Error: " . $e->getMessage() . "\n";
}
?>

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