<?php
 
function tekaTekiTeko($batas) {
    if (!is_int($batas) || $batas < 20) {
        throw new InvalidArgumentException("Parameter harus berupa bilangan bulat >= 20");
    }
 
    for ($i = 1; $i <= $batas; $i++) {
        $output = '';
 
        // Perhatikan urutan: Teka (3), Teki (5), Teko (2)
        if ($i % 3 === 0) $output .= 'Teka';
        if ($i % 5 === 0) $output .= 'Teki';
        if ($i % 2 === 0) $output .= 'Teko';
 
        echo $output === '' ? $i : $output;
        echo PHP_EOL;
    }
}
 
// Contoh penggunaan
try {
    tekaTekiTeko(30);
} catch (Exception $e) {
    echo "Error: " . $e->getMessage();
}
 

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