Full script for the Google Developer Day Quiz (http://developerquiz.appspot.com) in 39 lines (max: 80 char/line)

developerquiz.php

<?php isset($argv[1]) OR die('Input file should be the first arg on cmd line.');

const G_FOO     = 'bjdrf';                //Googlon special letters
const G_INV     = 'c';                    //Preposition invalidator
const G_PREP    = 3;                      //Preposition size
const G_VERB    = 6;                      //Verb size
const G_ORDER   = 'gkvrbjwtnlphzfmdxcqs'; //Letter ordering
const G_NUM_MOD = 5;                      //Pretty number divisor
const G_NUM_MAX = 860533;                 //Pretty number minimum

$a    = array('array_filter', 'array_unique');
$text = explode(' ', file_get_contents($argv[1]));
echo 'Prepositions: '   .  count($a[0]($text, 'is_prep')) . PHP_EOL .
     'Verbs: '          .  count($a[0]($text, 'is_verb')) . PHP_EOL .
     'First Person: '   .  count($a[0]($text, 'is_fp_verb')) . PHP_EOL .
     'Pretty Numbers: ' .  count($a[0]($a[1]($text), 'is_nice')) . PHP_EOL .
     'Vocabulary: '     .  implode(' ', gsort($a[1]($text))) . PHP_EOL;

function is_prep($str) {
    return G_PREP == strlen($str) && false === stripos(G_FOO, substr($str, -1))
        && false === stripos($str, G_INV);
}
function is_verb($str) {
    return strlen($str) >= G_VERB && false === stripos(G_FOO, substr($str, -1));
}
function is_fp_verb($str) {
    return is_verb($str) && false === stripos(G_FOO, $str[0]);
}
function is_nice($str) { 
    $gnumber = base_convert(strrev(strmask($str)), 20, 10);
    return (int) bcmod($gnumber, G_NUM_MOD) === 0 && $gnumber >= G_NUM_MAX;
}
function strmask($str) {
    return strtr($str, G_ORDER, '0123456789abcdefghij');
}
function gsort(array $arr) {
    usort($arr,function($a,$b) { return strcasecmp(strmask($a),strmask($b)); });
    return $arr;
}

39Lx80 👍

Boa!