Given the strings `s1` and `s2` of size `n` and the string `evil`, return _the number of **good** strings_.

A **good** string has size `n`, it is alphabetically greater than or equal to `s1`, it is alphabetically smaller than or equal to `s2`, and it does not contain the string `evil` as a substring. Since the answer can be a huge number, return this **modulo** `109 + 7`.

**Example 1:**

**Input:** n = 2, s1 =  "aa ", s2 =  "da ", evil =  "b "
**Output:** 51 
**Explanation:** There are 25 good strings starting with 'a':  "aa ", "ac ", "ad ",..., "az ". Then there are 25 good strings starting with 'c':  "ca ", "cc ", "cd ",..., "cz " and finally there is one good string starting with 'd':  "da ". 

**Example 2:**

**Input:** n = 8, s1 =  "leetcode ", s2 =  "leetgoes ", evil =  "leet "
**Output:** 0 
**Explanation:** All strings greater than or equal to s1 and smaller than or equal to s2 start with the prefix  "leet ", therefore, there is not any good string.

**Example 3:**

**Input:** n = 2, s1 =  "gx ", s2 =  "gz ", evil =  "x "
**Output:** 2

**Constraints:**

*   `s1.length == n`
*   `s2.length == n`
*   `s1 <= s2`
*   `1 <= n <= 500`
*   `1 <= evil.length <= 50`
*   All strings consist of lowercase English letters.


from bisect import bisect_left


def suggestedProducts(products, searchWord):
    products.sort()
    result = []
    current_prefix = ""

    for letter in searchWord:
        current_prefix += letter
        index = bisect_left(products, current_prefix)
        suggestions = []

        for i in range(3):
            if index < len(products) and products[index].startswith(current_prefix):
                suggestions.append(products[index])
                index += 1
            else:
                break

        result.append(suggestions)

    return result
