#423

Reconstruct Original Digits from English

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Description

The string s contains letters scrambled from English digit names ("zero" through "nine"). Determine how many times each digit 0–9 appears in s and return all digits in ascending order as a single string.

Example 1:

Input: s = "owoztneoer"
Output: "012"

Example 2:

Input: s = "fviefuro"
Output: "45"

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