#include <iostream>

using namespace std;
const int MAXN = 100000 + 100;
const int N = 8;

int main(){
    int mas[N][N];

    for (int i = 0; i < N; ++i){
        mas[0][i] = ((i + 1) % 2);
    }

    for (int i = 1; i < N; ++i){
        for (int j = 0; j < N; ++j){
            if (mas[i - 1][j] == 0){
                mas[i][j] = 1;
            } else {
                mas[i][j] = 0;
            }
        }
    }

    int i, j;

    char c;

    cin >> c;
    i = c - 'A';

    cin >> c;
    j = c - '1';

    if (mas[i][j] == 1){
        cout << "BLACK" << endl;
    } else {
        cout << "WHITE" << endl;
    }

    return 0;
}