真实位置	匿名位置集
$l o c_{1}$	$l o c_{1}, l o c_{1}^{d_{1}}, l o c_{1}^{d_{2}}, l o c_{1}^{d_{3}}, \dots$
$l o c_{2}$	$l o c_{2}, l o c_{2}^{d_{1}}, l o c_{2}^{d_{2}}, l o c_{2}^{d_{3}}, \dots$
$l o c_{3}$	$l o c_{3}, l o c_{3}^{d_{1}}, l o c_{3}^{d_{2}}, l o c_{3}^{d_{3}}, \dots$