423\. Reconstruct Original Digits from English

Medium

Given a string `s` containing an out-of-order English representation of digits `0-9`, return _the digits in **ascending** order_.

**Example 1:**

**Input:** s = "owoztneoer"

**Output:** "012" 

**Example 2:**

**Input:** s = "fviefuro"

**Output:** "45" 

**Constraints:**

*   <code>1 <= s.length <= 10<sup>5</sup></code>
*   `s[i]` is one of the characters `["e","g","f","i","h","o","n","s","r","u","t","w","v","x","z"]`.
*   `s` is **guaranteed** to be valid.