<?php 
    $user_input = ""; 
function printMultiples($N) {
    // Ensure $N is a positive integer
    if ($N > 0) {
        // Calculate the first three multiples
        $first = $N * 1;
        $second = $N * 2;
        $third = $N * 3;
        
        // Print the multiples with a single space between them
        echo "$first $second $third";
    } else {
        echo "Please enter a positive integer.";
    }
}

// Example usage:
$N = 5; // You
