import java.util.Scanner;
import java.util.function.Function;

public class LambdaStringCase {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter a string: ");
        String input = scanner.nextLine();

        Function<String, String> toUpperCase = str -> str.toUpperCase();

        Function<String, String> toLowerCase = str -> str.toLowerCase();

        String upperCaseString = toUpperCase.apply(input);
        System.out.println("Uppercase: " + upperCaseString);

        String lowerCaseString = toLowerCase.apply(input);
        System.out.println("Lowercase: " + lowerCaseString);
    }
}