# 791. Custom Sort String LeetCode Solution | Easy Approach

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Custom Sort You are given two strings order and s. All the words of `order` are unique and were sorted in some custom order previously.

Permute the characters of `s` so that they match the order that `order` was sorted. More specifically, if a character `x` occurs before a character `y` in `order`, then `x` should occur before `y` in the permuted string.

Return any permutation of `s` that satisfies this property.

Example 1:

```Input: order = "cba", s = "abcd"
Explanation:
"a", "b", "c" appear in order, so the order of "a", "b", "c" should be "c", "b", and "a".
Since "d" does not appear in order, it can be at any position in the returned string. "dcba", "cdba", "cbda" are also valid outputs.
```

Example 2:

```Input: order = "cbafg", s = "abcd"
```

Constraints:

• `1 <= order.length <= 26`
• `1 <= s.length <= 200`
• `order` and `s` consist of lowercase English letters.
• All the characters of `order` are unique.

Time: O(n)
Space: O(n)

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