public function reverse_left_and_right_4value_shorthands($property, $value) {
		$shorthands = & $this->parser->data['csstidy']['shorthands'];
		if (isset($shorthands[$property])) {
			$property_right = $shorthands[$property][1];
			$property_left = $shorthands[$property][3];
			$v = $this->dissolve_4value_shorthands($property, $value);
			if ($v[$property_left] !== $v[$property_right]) {
				$r = $v[$property_right];
				$v[$property_right] = $v[$property_left];
				$v[$property_left] = $r;
				$v = $this->merge_4value_shorthands($v);
				if (isset($v[$property])) {
					return $v[$property];
				}
			}
		}
		return $value;
	}