PasswordGenerator

import java.util.Scanner;

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

        int n = Integer.parseInt(scanner.nextLine());
        int L = Integer.parseInt(scanner.nextLine());

        for (int firstSymbol = 1; firstSymbol <= n ; firstSymbol++) {
            for (int secondSymbol = 1; secondSymbol <= n; secondSymbol++) {
                for (int thirdSymbol = 97; thirdSymbol <= 96+L; thirdSymbol++) {
                    char thirdSymbolToChar = (char) thirdSymbol;
                    for (int forthSymbol = 97; forthSymbol <= 96+L ; forthSymbol++) {
                        char forthSymbolToChar = (char) forthSymbol;
                        for (int fifthSymbol = 1; fifthSymbol <= firstSymbol && fifthSymbol < secondSymbol; fifthSymbol++) {
                            System.out.printf("%d%d%c%c%d " , fifthSymbol , secondSymbol , thirdSymbolToChar , forthSymbolToChar , fifthSymbol);
                        }
                    }
                }
            }
        }
    }
}