import java.util.Scanner;

public class TestZaStringToChar {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        String []niza1 = scan.nextLine().split(" <-> ");;
        char []nizaChar = new char[niza1.length];
        for(int i = 0; i < niza1.length ; i++)
        {
            nizaChar[i] = niza1[i].charAt(0);
        }
    }

}