public static String appendAndDelete(String s, String t, int k) {
    // Write your code here
        int length_s = s.length();
        int length_t = t.length();
        if(k >= length_s + length_t) return "Yes";
        else{
            int differenciator = 0;
            int min_operations = 0;
            
            for (int i = 0; i < (length_s>=length_t?length_t:length_s); i++) {
                if(s.charAt(i) == t.charAt(i)) differenciator++;
                else break;
            }
            
            min_operations = (length_s - differenciator) + (length_t - differenciator);
            
            if(k < min_operations) return "No";
            else if(k == min_operations) return "Yes";
            else{
                if(min_operations%2 == 0){
                    if(k%2 == 0) return "Yes";
                    else return "No";
                }
                else{
                    if(k%2 != 0) return "Yes";
                    else return "No";
                }
            }
        }
    }