423. Reconstruct Original Digits from English

Description

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:

1 <= s.length <= 10⁵
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.