07. Safe Passwords Generator

import java.util.Scanner;

public class SafePasswordsGenerator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int a = Integer.parseInt(scanner.nextLine()),
                b = Integer.parseInt(scanner.nextLine()),
                passCount = Integer.parseInt(scanner.nextLine()),
                charA = 35, charB = 64;

        for (int j = 1; j <= a; j++) {
            for (int x = 1; x <= b; x++) {
                if (charA == 56) {
                    charA = 35;
                }
                if (charB == 97) {
                    charB = 64;
                }
                System.out.printf("%c%c%d%d%c%c|", charA, charB, j, x, charB, charA);
                passCount--;
                charA++;
                charB++;

                if (passCount == 0) {
                    break;
                }
            }
            if (passCount == 0) {
                break;
            }
        }
    }
}

ИЛИ:

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int a = Integer.parseInt(scanner.nextLine()),
                b = Integer.parseInt(scanner.nextLine()),
                passCount = Integer.parseInt(scanner.nextLine()),
                charA = 35, charB = 64;

        for (int j = 1; j <= a; j++) {
            for (int x = 1; x <= b; x++) {
                if (charA == 56) {
                    charA = 35;
                }
                if (charB == 97) {
                    charB = 64;
                }
                System.out.printf("%c%c%d%d%c%c|", charA, charB, j, x, charB, charA);
                passCount--;
                charA++;
                charB++;

                if (passCount == 0) {
                    return;
                }
            }
        }
    }
}