<?php

$chars = 'abcd';
for($i = 0; $i < 100; $i++) echo $chars{mt_rand(0, 3)} . "\n";

?>

c
b
c
a
d
a
d
d
d
c
d
c
d
c
b
b
c
b
b
c
a
c
d
c
b
b
b
c
c
c
d
c
d
c
a
b
a
a
d
b
b
a
d
c
b
d
c
d
a
a
c
a
c
d
b
b
d
a
b
d
a
a
d
d
c
c
b
b
c
d
b
b
b
a
d
c
b
b
c
a
d
c
a
a
a
c
d
c
b
c
d
a
a
a
d
c
a
c
c
c