class cypher {
public static String cypher(String s) {
   String s2 = "";
   int i;
   char c;
   for(i=0; i<s.length(); i++) {
      c = (char)(s.charAt(i) + (char)62);
      s2 = s2 + c;
      s2 = s2 + '-';
      }
   return s2;
}
public static String decypher(String s) {
   String s2 = "";
   int i;
   char c;
   for(i=0; i<s.length(); i++) {
      c = (char)(s.charAt(i) - (char)62);
      s2 = s2 + c;
      i++;
      }
   return s2;
}
public static void main(String[] args) {
   String s2 = cypher("Hello, world");
   System.out.println(s2);
   System.out.println("...or if you prefer: " + decypher(s2));
}
}