NameDecipher

package deciphername;
public class DecipherName {
    public static void main(String[] args) {
        String number = "86232316280027192";
        int MagicNumber = Integer.parseInt(number.substring(0, 1));
        StringBuilder sb = new StringBuilder(number);
        sb.replace(0, 1, "");
        sb.reverse();
        System.out.println(sb.toString());
        String alphabet = "абвгдеёжзийклмнопрстуфхцчшщъыьэюя";
        StringBuilder output = new StringBuilder();
        String CurrentSym = "";
        while (!sb.toString().equals("")) {
            if (sb.length() != 1) {
                CurrentSym = sb.substring(0, 2);
                sb.replace(0, 2, "");
                System.out.println(sb.toString() + " " + sb.length());

            } else {
                CurrentSym = sb.substring(0, 1);
                sb.replace(0, 1, "");
            }
            int CurrentIndex = Integer.parseInt(CurrentSym) - MagicNumber;
            char ElementChar = alphabet.charAt(CurrentIndex);
            output.append(ElementChar);

        }

        System.out.println(output.toString());
    }

}