package zut;

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Szachownica {
    private static final String nextLineChar = "\n";

    public static void main(String[] args) {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        try {
        System.out.print("Podaj szerokosc kafelka: ");
        int tileWidth = Integer.parseInt(br.readLine());
        System.out.print("Podaj wysokosc kafelka: ");
        int tileHeight = Integer.parseInt(br.readLine());
        System.out.print("Podaj ilosc kafelkow w poziomie: ");
        int width = Integer.parseInt(br.readLine());
        System.out.print("Podaj ilosc kafelkow w pionie: ");
        int height = Integer.parseInt(br.readLine());
        System.out.print("Podaj znak bialego kafelka: ");
        String whiteTile = br.readLine();
        System.out.print("Podaj znak czarnego kafelka: ");
        String blackTile = br.readLine();
        if(validateInput(tileWidth, tileHeight, width, height, whiteTile, blackTile)){
            printBoard(tileWidth, tileHeight, width, height, whiteTile, blackTile);
        }
        } catch(Exception ex){
        }
        finally{
         System.exit(0);
        }
    }

    private static String switchTile(String current, String white, String black)
    {
        if(current.equals(white)){
            current = black;
        }
        else{
            current = white;
        }
        return current;
    }

    private static void printBoard(int tileWidth, int tileHeight,int width, int height, String whiteTile,String blackTile)
    {
        StringBuilder boxBuilder = new StringBuilder();
        String currentTile = whiteTile;
        for (int i = 0; i < height; i++) {
            for (int j = 0; j < tileHeight; j++) {
                for (int x = 0; x < width; x++) {
                for (int k = 0; k < tileWidth; k++) {
                    boxBuilder.append(currentTile);
                }
                currentTile = switchTile(currentTile, whiteTile, blackTile);
                }
                boxBuilder.append(nextLineChar);
            }
            currentTile = switchTile(currentTile, whiteTile, blackTile);
        }
        System.out.print(boxBuilder.toString());
    }

    private static Boolean validateInput(int tileWidth, int tileHeight,int width, int height, String whiteTile,String blackTile)
    {
        Boolean isValid = true;
        if(tileWidth < 1 || tileWidth > 15){
            isValid = false;
        }
        if(tileHeight < 1 || tileHeight >15){
            isValid = false;
        }
        if(width < 1 || width > 15){
            isValid = false;
        }
        if(height < 1 || height > 15){
            isValid = false;
        }
        if(whiteTile.length() != 1){
            isValid = false;
        }
        if(blackTile.length() != 1){
            isValid = false;
        }
        return isValid;
    }
}