"I've been working on the function and encountered an issue that I haven't been able to resolve. Here's the code I'm using:

Java 7

public class Solution {

public static String stringsXOR(String s, String t) {
    StringBuilder res = new StringBuilder(); // Use StringBuilder for efficient concatenation

    for (int i = 0; i < s.length(); i++) {
    // Calculate XOR for each pair of characters
        res.append(s.charAt(i) ^ t.charAt(i));
    }

    return res.toString().trim();
}

public static void main(String[] args) {

    String s, t;
    Scanner in = new Scanner(System.in);
    s = in.nextLine();
    t = in.nextLine();
    System.out.print(stringsXOR(s, t));

It passes basic test cases manually, but when running in the environment, it fails with a 'Wrong Answer' message.

I can't figure out where the issue lies, as both the outputs seem the same. If anyone can provide insights or point out anything I might have missed, I'd really appreciate the help. Thanks in advance!"

}

}