Find Deletion Distance

Can you determine the deletion distance between two strings? Let's define the deletion distance as the numbers of characters needed to delete from two strings to make them equal.

For example, the deletion distance of algo and daily is 5. The reason is we can delete the go (2 deletion) in algo, and the d, i and y (3 deletions) in daily.

Constraints

• Length of both the strings <= 1000
• The strings can be empty
• Take into consideration all the ASCII characters
• Let m and n be the the lengths of string 1 and string 2
• Expected time complexity O(m*n)
• Expected space complexity : O(m*n)

```js
function deletionDistance(str1, str2) {
	return '';
}
```