
import java.util.*;
import java.io.*;

import static java.lang.Character.isUpperCase;

public class Main {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        String str = in.next();
        char ch = str.charAt(0); //to check the char placed at index no 0 of the string

        if(isUpperCase(ch)==true) //default function to check whether the given character of the string is uppercase or not
        {
            System.out.println('A');
        }
        else
            {
                System.out.println('a');
            }
            }
    } import java.util.*; util.* java import java.io.*; io.* java import static java.lang.Character.isUpperCase; import static java.lang.Character.isUpperCase; import static java.lang.Character.isUpperCase; public class Main {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        String str = in.next();
        char ch = str.charAt(0); //to check the char placed at index no 0 of the string

        if(isUpperCase(ch)==true) //default function to check whether the given character of the string is uppercase or not
        {
            System.out.println('A');
        }
        else
            {
                System.out.println('a');
            }
            }
    } Main public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        String str = in.next();
        char ch = str.charAt(0); //to check the char placed at index no 0 of the string

        if(isUpperCase(ch)==true) //default function to check whether the given character of the string is uppercase or not
        {
            System.out.println('A');
        }
        else
            {
                System.out.println('a');
            }
            } main {

        Scanner in = new Scanner(System.in);
        String str = in.next();
        char ch = str.charAt(0); //to check the char placed at index no 0 of the string

        if(isUpperCase(ch)==true) //default function to check whether the given character of the string is uppercase or not
        {
            System.out.println('A');
        }
        else
            {
                System.out.println('a');
            }
            } Scanner in = new Scanner(System.in); in new Scanner(System.in) String str = in.next(); str in.next() in.next in char ch = str.charAt(0); ch str.charAt(0) str.charAt str 0 if(isUpperCase(ch)==true) //default function to check whether the given character of the string is uppercase or not
        {
            System.out.println('A');
        }
        else
            {
                System.out.println('a');
            } isUpperCase(ch)==true isUpperCase(ch) isUpperCase ch true {
            System.out.println('A');
        } System.out.println('A') System.out.println System.out System System.out 'A' {
                System.out.println('a');
            } System.out.println('a') System.out.println System.out System System.out 'a' String[] args args public class Main {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        String str = in.next();
        char ch = str.charAt(0); //to check the char placed at index no 0 of the string

        if(isUpperCase(ch)==true) //default function to check whether the given character of the string is uppercase or not
        {
            System.out.println('A');
        }
        else
            {
                System.out.println('a');
            }
            }
    } public class Main {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        String str = in.next();
        char ch = str.charAt(0); //to check the char placed at index no 0 of the string

        if(isUpperCase(ch)==true) //default function to check whether the given character of the string is uppercase or not
        {
            System.out.println('A');
        }
        else
            {
                System.out.println('a');
            }
            }
    } Main

import java.util.*;
import java.io.*;

import static java.lang.Character.isUpperCase;

public class Main {

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        String str = in.next();
        char ch = str.charAt(0); //to check the char placed at index no 0 of the string

        if(isUpperCase(ch)==true) //default function to check whether the given character of the string is uppercase or not
        {
            System.out.println('A');
        }
        else
            {
                System.out.println('a');
            }
            }
    }
