private function step4()
{
$this->step4Replacements->rewind();
while ($this->step4Replacements->valid()) {
if ($this->sb->count() >= strlen($this->step4Replacements->current()) && $this->sb->SubStr($this->sb->count() - strlen($this->step4Replacements->current()), strlen($this->step4Replacements->current())) == $this->step4Replacements->current()) {
if ($this->sb->count() - strlen($this->step4Replacements->current()) >= $this->r2) {
switch ($this->step4Replacements->current()) {
case "ion":
if ($this->sb->count() > 3 && ($this->sb->offsetGet($this->sb->count() - strlen($this->step4Replacements->current()) - 1) == 's' || $this->sb->offsetGet($this->sb->count() - strlen($this->step4Replacements->current()) - 1) == 't')) {
$this->sb->Remove($this->sb->count() - strlen($this->step4Replacements->current()), strlen($this->step4Replacements->current()));
}
return;
default:
$this->sb->Remove($this->sb->count() - strlen($this->step4Replacements->current()), strlen($this->step4Replacements->current()));
return;
}
} else {
return;
}
}
$this->step4Replacements->next();
}
}
