content: package cell;
  
  import java.io.*;
  import java.util.*;
  
  public class Cell {
      public static void main(String[] args) throws IOException {
          ArrayList<String> coordinate = new ArrayList<>();
          ArrayList<String> letter = new ArrayList<>(Arrays.asList("A", "B", "C", "D", "E", "F", "G", "H"));
          String cellColor = null;
          FileReader file = new FileReader("input.txt");
          Scanner sc = new Scanner(file);
          String str = sc.nextLine();
          char[] ch = str.toCharArray();
          for(char aCh : ch){
              coordinate.add(String.valueOf(Character.valueOf(aCh)));
          }
          for(int i = 0; i < letter.size(); i++){
              if(letter.get(i).equals(coordinate.get(0))){
                  cellColor = ((i+1)%2 == 0 && Integer.valueOf(coordinate.get(1)) % 2 == 0) ? "BLACK" :
                          ((i+1)%2 == 1 && Integer.valueOf(coordinate.get(1)) % 2 == 1)  ? "BLACK" : "WHITE";
              }
          }
          FileWriter fileOut = new FileWriter("output.txt");
          fileOut.write(Objects.requireNonNull(cellColor));
          fileOut.close();
      }
  }
  