Given a 0-indexed string `word` and a character `ch`, reverse the segment of `word` that starts at index `0` and ends at the index of the first occurrence of `ch` (inclusive). If the character `ch` does not exist in `word`, do nothing.

- For example, if `word = "abcdefd"` and `ch = "d"`, then you should reverse the segment that starts at `0` and ends at `3` (inclusive). The resulting string will be `"dcbaefd"`.

Return the resulting string.

Example 1:

    Input: word = "abcdefd", ch = "d"
    Output: "dcbaefd"
    Explanation: The first occurrence of "d" is at index 3.
    Reverse the part of word from 0 to 3 (inclusive), the resulting string is "dcbaefd".

Example 2:

    Input: word = "xyxzxe", ch = "z"
    Output: "zxyxxe"
    Explanation: The first and only occurrence of "z" is at index 3.
    Reverse the part of word from 0 to 3 (inclusive), the resulting string is "zxyxxe".

Example 3:

    Input: word = "abcd", ch = "z"
    Output: "abcd"
    Explanation: "z" does not exist in word.
    You should not do any reverse operation, the resulting string is "abcd".

Constraints:

- `1 <= word.length <= 250`
- `word` consists of lowercase English letters.
- `ch` is a lowercase English letter.