<?php

    function reduz_numero($n) {
    	if ($n < 0) return "-" . reduz_numero(-$n);
        $k = "";
        while (round($n) >= 1000) {
            $k = $k . "k";
            $n = $n / 1000;
        }
        return round($n) . $k;
    }

    echo "         5->" . reduz_numero(         5) . "\n";
    echo "       999->" . reduz_numero(       999) . "\n";
    echo "      1000->" . reduz_numero(      1000) . "\n";
    echo "      1001->" . reduz_numero(      1001) . "\n";
    echo "      1499->" . reduz_numero(      1499) . "\n";
    echo "      1500->" . reduz_numero(      1500) . "\n";
    echo "      1501->" . reduz_numero(      1501) . "\n";
    echo "     10000->" . reduz_numero(     10000) . "\n";
    echo "    999499->" . reduz_numero(    999499) . "\n";
    echo "    999500->" . reduz_numero(    999500) . "\n";
    echo "    999501->" . reduz_numero(    999501) . "\n";
    echo "1000000000->" . reduz_numero(1000000000) . "\n";
    echo "    -77777->" . reduz_numero(    -77777) . "\n";
    echo "   9499999->" . reduz_numero(   9499999) . "\n";
    echo "   9500000->" . reduz_numero(   9500000) . "\n";
?>