$$\left. \begin{array} { l } { 65 , 20 } \\ { 30 , 40 } \\ { 71 , 83 } \\ { 39 , 10 } \end{array} \right.$$
$10,20,30,39,40,65,71,83$
$$65$$
$$20,65$$
$$20,30,65$$
$$20,30,40,65$$
$$20,30,40,65,71$$
$$20,30,40,65,71,83$$
$$20,30,39,40,65,71,83$$
$$10,20,30,39,40,65,71,83$$
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$65,\ 20,\ 30,\ 40,\ 71,\ 83,\ 39,\ 10$