Шифр есть? А если найду?

//стр.6 main
//стр.40 reverse
//стр.49 println
package hate;

public class Main {

     public static void main(String[] args) {
        String text = "задачч";
        String check = "даччаз";
        if (text.length() == check.length()) {
            String cipherStart = "";
            boolean tf = false;
            int index = 0;
            for (int i = 1; i < check.length(); i++) {
                cipherStart = (String) check.subSequence(0, i);

                if (text.contains(cipherStart)) {
                    tf= true;
                    index++;
                }
            }
            cipherStart = (String) check.subSequence(0, index);
            if (tf) {
                String cipherOver = "";
                cipherOver = (String) text.subSequence(0, text.length()-index);
                String cipherHave = cipherStart + reverse(cipherOver);
                println(cipherHave);
                if (cipherHave.equals(check))
                    println("YES");
                else
                    println("NO");
            }
        }
        else
           println("NO");
    }


    public static String reverse (String necessary){
        String overReverse = "";
        for(int i = necessary.length()-1;i >= 0;i--){
            overReverse += necessary.charAt(i);
        }
        return overReverse;
    }


    public static void println(String output){
         System.out.println(output);
    }
}