Rearrange Stickers to Form Words

You have a collection of stickers, each represented as a string. You can use stickers to form words. Each sticker can be used multiple times, but you want to determine if you can form a given target word using these stickers. Return the minimum number of stickers needed to form the target word, or -1 if it is not possible. For example, stickers = ['with', 'example', 'science'], target = 'thehat' requires 3 stickers. Input Format: - The first line contains an integer n (1 ≤ n ≤ 20), the number of stickers. - The second line contains n space-separated strings, the stickers. - The third line contains the target word. Output Format: - Output a single integer, the minimum number of stickers needed to form the target word. Example: Input: 3 with example science thehat Output: 3