code: public String decodeHex(String hash) {
          final StringBuilder result  = new StringBuilder();
          final long[]        numbers = this.decode(hash);
  
          for (final long number : numbers) {
              result.append(Long.toHexString(number).substring(1));
          }
  
          return result.toString();
      }
docs: Decrypt string to numbers
  
  @param hash the encrypt string
  @return decryped numbers