Group Name

import java.text.DecimalFormat;
import java.util.Scanner;

public class demo {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);


        char ch1 = scan.nextLine().charAt(0);
        char ch2 = scan.nextLine().charAt(0);
        char ch3 = scan.nextLine().charAt(0);
        char ch4 = scan.nextLine().charAt(0);
        int n = Integer.parseInt(scan.nextLine());

        int count = -1;

        for (char i = 'A'; i <= ch1; i++) {
            for (char j = 'a';  j <= ch2;  j++) {
                for (char k = 'a'; k <= ch3; k++) {
                    for (char l = 'a'; l <= ch4; l++) {
                        for (int m = 0; m <= n; m++) {
                            count++;
                        }
                    }
                }
            }
        }

        System.out.println(count);
    }
}