import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        String str = input.nextLine();
        String another = str.replace('a', 'A');
        if (str.equals(another)) {
            System.out.println("No a symbols");
        } else {
            System.out.println(another);
        }
    }
}