public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(System.in);
PrintWriter out = new PrintWriter(System.out);
sc.waitForInput(3000);
nCr(2005);
while (sc.Ready()) out.println(Cat(sc.nextInt()));
out.flush();
out.close();
}
public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(System.in);
PrintWriter out = new PrintWriter(System.out);
sc.waitForInput(2000);
int n;
dp = new int[100];
Arrays.fill(dp, -1);
while (sc.Ready()) {
n = sc.nextInt();
out.println(rec(n));
}
out.flush();
out.close();
}
public static void main(String[] args) throws IOException {
Scanner sc = new Scanner(System.in);
PrintWriter out = new PrintWriter(System.out);
sc.waitForInput(3000);
TreeSet<String> ts = new TreeSet<>();
String temp = "";
boolean flag = false;
while (sc.Ready()) {
String line = sc.nextLine();
if (line.isEmpty()) continue;
line = line.toLowerCase();
flag = false;
int len = line.length();
for (int i = 0; i < len; i++) {
if (line.charAt(i) >= 'a' && line.charAt(i) <= 'z') temp += line.charAt(i);
else if (line.charAt(i) == '-') {
if (i != len - 1) temp += line.charAt(i);
else flag = true;
} else {
if (!temp.isEmpty() && !ts.contains(temp)) ts.add(temp);
temp = "";
}
}
if (flag) continue;
if (!temp.isEmpty() && !ts.contains(temp)) ts.add(temp);
temp = "";
}
if (flag) temp += '-';
if (!temp.isEmpty() && !ts.contains(temp)) ts.add(temp);
for (String s : ts) out.println(s);
out.flush();
out.close();
}