算法训练 大小写判断

import java.util.Scanner;
public class Main {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner sc=new Scanner(System.in);
        String s=sc.nextLine();
        char ch=s.charAt(0);
        if(Character.isLowerCase(ch))
            System.out.println("lower");
        else
            System.out.println("upper");

    }

}