<?php
$letters = array();
for ($i=0; $i<1000000; $i++){
	$c=chr(65+rand(0,675)**.5);
	$letters[$c] = isset($letters[$c])?$letters[$c]+1:1;
}

ksort($letters);

foreach ($letters as $l=>$n){
	echo $l.": ".($n/array_sum($letters)*100)."%\n";
}