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

$arr2["han\]["weight"] : 60
$arr2["han"]["height"] : 170
$arr2["seo"]["weight"] : 70
$arr12["seo"]["weight"] : 70