$arr1 ["han"] ["weight"] : 60
$arr1 ["han"] ["height"] : 170
$arr1 ["seo"] ["weight"] : 70
$arr1 ["seo"] ["height"] : 180

$arr2 ["han"] ["weight"] : 60
$arr2 ["han"] ["height"] : 170
$arr2 ["seo"] ["weight"] : 70
$arr2 ["seo"] ["height"] : 180