import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            String a = sc.next();
            System.out.println(Character.isUpperCase(a.charAt(0)) ? "A" : "a");
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            String a = sc.next();
            System.out.println(Character.isUpperCase(a.charAt(0)) ? "A" : "a");
        }
    }
} Main public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            String a = sc.next();
            System.out.println(Character.isUpperCase(a.charAt(0)) ? "A" : "a");
        }
    } main {
        try (Scanner sc = new Scanner(System.in)) {
            String a = sc.next();
            System.out.println(Character.isUpperCase(a.charAt(0)) ? "A" : "a");
        }
    } try (Scanner sc = new Scanner(System.in)) {
            String a = sc.next();
            System.out.println(Character.isUpperCase(a.charAt(0)) ? "A" : "a");
        } {
            String a = sc.next();
            System.out.println(Character.isUpperCase(a.charAt(0)) ? "A" : "a");
        } Scanner sc = new Scanner(System.in) Scanner sc = new Scanner(System.in) new Scanner(System.in) String a = sc.next(); a sc.next() sc.next sc System.out.println(Character.isUpperCase(a.charAt(0)) ? "A" : "a") System.out.println System.out System System.out Character.isUpperCase(a.charAt(0)) ? "A" : "a" Character.isUpperCase(a.charAt(0)) Character.isUpperCase Character a.charAt(0) a.charAt a 0 "A" "a" String[] args args public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            String a = sc.next();
            System.out.println(Character.isUpperCase(a.charAt(0)) ? "A" : "a");
        }
    }
} public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            String a = sc.next();
            System.out.println(Character.isUpperCase(a.charAt(0)) ? "A" : "a");
        }
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            String a = sc.next();
            System.out.println(Character.isUpperCase(a.charAt(0)) ? "A" : "a");
        }
    }
}
