import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        final String a = sc.next();

        System.out.println(a.equals(a.toUpperCase()) ? "A" : "a");
    }
} import java.util.Scanner; Scanner java.util public class Main {

    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        final String a = sc.next();

        System.out.println(a.equals(a.toUpperCase()) ? "A" : "a");
    }
} Main public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        final String a = sc.next();

        System.out.println(a.equals(a.toUpperCase()) ? "A" : "a");
    } main {
        final Scanner sc = new Scanner(System.in);

        final String a = sc.next();

        System.out.println(a.equals(a.toUpperCase()) ? "A" : "a");
    } final Scanner sc = new Scanner(System.in); sc new Scanner(System.in) final String a = sc.next(); a sc.next() sc.next sc System.out.println(a.equals(a.toUpperCase()) ? "A" : "a") System.out.println System.out System System.out a.equals(a.toUpperCase()) ? "A" : "a" a.equals(a.toUpperCase()) a.equals a a.toUpperCase() a.toUpperCase a "A" "a" String[] args args public class Main {

    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        final String a = sc.next();

        System.out.println(a.equals(a.toUpperCase()) ? "A" : "a");
    }
} public class Main {

    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        final String a = sc.next();

        System.out.println(a.equals(a.toUpperCase()) ? "A" : "a");
    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        final Scanner sc = new Scanner(System.in);

        final String a = sc.next();

        System.out.println(a.equals(a.toUpperCase()) ? "A" : "a");
    }
}
