I'm new in Ruby. I have two arrays of hashes

```
arr1 = [{"one"=> {"1"=> "a", "2" => "b"}, "two" => {"3" => "n", "5" => "h", "7" => "k"}]
arr2 = [{"one"=> {"8"=> "f", "11" => "r"}, "two" => {"7" => "o", "6" => "b", "14" => "b"}]

```

and I want to have one array like this:

```
arr3 = [{
"one"=> {"1"=> "a", "2" => "b", "8"=> "f", "11" => "r"}, 
"two" => {3" => 'n", "5" => "h", "7" => "k", 7" => 'o", "6" => "b", "14" => "b"}
]

```

so I want to merge hashes by keys and "add" their values. Can anyone help?