class HyphenWordToPhrase {
  int pos;
  int numParts;
  String in;
  StringBuilder out;

  HyphenWordToPhrase(String in) {
    this.in = in;
    out = new StringBuilder(in.length());
  }

  String convert() {
    while (hasMore()) {
      parseWord();
    }
    String o = out.toString();
    if (numParts > 0) {
      o = "<2>"+o;
    }
    return o;
  }

  private void parseWord() {
    parseChars();
    parseHyphens();
  }

  private int parseHyphens() {
    int i = 0;
    boolean isLeading = i == pos;
    while (hasMore() && in.charAt(pos) == '-') {
      pos++;
      i++;
    }
    boolean isTrailing = !hasMore();
    if (i > 0) {
      if (i == 1) {
        if (!isLeading && !isTrailing) {
          out.append("<->");
          numParts++;
        }
      } else if (i > 1) {
        out.append("<->");
      }
    }
    return i;
  }

  private void parseChars() {
    char c;
    while (hasMore() && (c = in.charAt(pos)) != '-') {
      pos++;
      out.append(c);
    }
  }

  boolean hasMore() {
    return pos < this.in.length();
  }

  public static void main(String[] args) {
    String in = "one-of-a-kind";
    HyphenWordToPhrase m = new HyphenWordToPhrase(in);
    System.out.println(m.convert());
  }

}