#include <stdio.h>

int main()
{
    int sach[8][8];
    int black[64], white[64];
    int w, b, i, j;

    for (i = 0; i < 8; i++)
    {
        for (j = 0; j < 8; j++)
        {
            sach[i][j] = 0;
        }
    }

    scanf("%d", &white[0]);
    scanf("%d", &white[1]);
    white[0]--;
    white[1]--;
    sach[white[0]][white[1]] = 1;
    w = 1;

    scanf("%d", &black[0]);
    scanf("%d", &black[1]);
    black[0]--;
    black[1]--;
    sach[black[0]][black[1]] = 2;
    b = 1;

    do{

            i = (w + 1) / 2;
            for (j = 0; j < i; j++)
            {
                if (white[j]+1 <= 7 && white[j+1]+2 <= 7 && sach[white[j] + 1][white[j + 1] + 2] == 0) {sach[white[j] + 1][white[j + 1] + 2] = 1; w += 2; white[w-1] = white[w-3] + 1; white[w] = white[w-2] + 2;}
                if (white[j]+2 <= 7 && white[j+1]+1 <= 7 && sach[white[j] + 2][white[j + 1] + 1] == 0) {sach[white[j] + 2][white[j + 1] + 1] = 1; w += 2; white[w-1] = white[w-3] + 1; white[w] = white[w-2] + 2;}
                if (white[j]+2 <= 7 && white[j+1]-1 >= 0 && sach[white[j] + 2][white[j + 1] - 1] == 0) {sach[white[j] + 2][white[j + 1] - 1] = 1; w += 2; white[w-1] = white[w-3] + 1; white[w] = white[w-2] + 2;}
                if (white[j]+1 <= 7 && white[j+1]-2 >= 0 && sach[white[j] + 1][white[j + 1] - 2] == 0) {sach[white[j] + 1][white[j + 1] - 2] = 1; w += 2; white[w-1] = white[w-3] + 1; white[w] = white[w-2] + 2;}
                if (white[j]-1 >= 0 && white[j+1]-2 >= 0 && sach[white[j] - 1][white[j + 1] - 2] == 0) {sach[white[j] - 1][white[j + 1] - 2] = 1; w += 2; white[w-1] = white[w-3] + 1; white[w] = white[w-2] + 2;}
                if (white[j]-2 >= 0 && white[j+1]-1 >= 0 && sach[white[j] - 2][white[j + 1] - 1] == 0) {sach[white[j] - 2][white[j + 1] - 1] = 1; w += 2; white[w-1] = white[w-3] + 1; white[w] = white[w-2] + 2;}
                if (white[j]-2 >= 0 && white[j+1]+1 <= 7 && sach[white[j] - 2][white[j + 1] + 1] == 0) {sach[white[j] - 2][white[j + 1] + 1] = 1; w += 2; white[w-1] = white[w-3] + 1; white[w] = white[w-2] + 2;}
                if (white[j]-1 >= 0 && white[j+1]+2 <= 7 && sach[white[j] - 1][white[j + 1] + 2] == 0) {sach[white[j] - 1][white[j + 1] + 2] = 1; w += 2; white[w-1] = white[w-3] + 1; white[w] = white[w-2] + 2;}

                if (white[j]+1 <= 7 && white[j+1]+2 <= 7 && sach[white[j] + 1][white[j + 1] + 2] == 2) {printf("white"); return 0;}
                if (white[j]+2 <= 7 && white[j+1]+1 <= 7 && sach[white[j] + 2][white[j + 1] + 1] == 2) {printf("white"); return 0;}
                if (white[j]+2 <= 7 && white[j+1]-1 >= 0 && sach[white[j] + 2][white[j + 1] - 1] == 2) {printf("white"); return 0;}
                if (white[j]+1 <= 7 && white[j+1]-2 >= 0 && sach[white[j] + 1][white[j + 1] - 2] == 2) {printf("white"); return 0;}
                if (white[j]-1 >= 0 && white[j+1]-2 >= 0 && sach[white[j] - 1][white[j + 1] - 2] == 2) {printf("white"); return 0;}
                if (white[j]-2 >= 0 && white[j+1]-1 >= 0 && sach[white[j] - 2][white[j + 1] - 1] == 2) {printf("white"); return 0;}
                if (white[j]-2 >= 0 && white[j+1]+1 <= 7 && sach[white[j] - 2][white[j + 1] + 1] == 2) {printf("white"); return 0;}
                if (white[j]-1 >= 0 && white[j+1]+2 <= 7 && sach[white[j] - 1][white[j + 1] + 2] == 2) {printf("white"); return 0;}



            }








            i = (b + 1) / 2;
            for (j = 0; j < i; j++)
            {
                if (black[j]+1 <= 7 && black[j+1]+2 <= 7 && sach[black[j] + 1][black[j + 1] + 2] == 0) {sach[black[j] + 1][black[j + 1] + 2] = 2; b += 2; black[b-1] = black[b-3] + 1; black[b] = black[b-2] + 2;}
                if (black[j]+2 <= 7 && black[j+1]+1 <= 7 && sach[black[j] + 2][black[j + 1] + 1] == 0) {sach[black[j] + 2][black[j + 1] + 1] = 2; b += 2; black[b-1] = black[b-3] + 1; black[b] = black[b-2] + 2;}
                if (black[j]+2 <= 7 && black[j+1]-1 >= 0 && sach[black[j] + 2][black[j + 1] - 1] == 0) {sach[black[j] + 2][black[j + 1] - 1] = 2; b += 2; black[b-1] = black[b-3] + 1; black[b] = black[b-2] + 2;}
                if (black[j]+1 <= 7 && black[j+1]-2 >= 0 && sach[black[j] + 1][black[j + 1] - 2] == 0) {sach[black[j] + 1][black[j + 1] - 2] = 2; b += 2; black[b-1] = black[b-3] + 1; black[b] = black[b-2] + 2;}
                if (black[j]-1 >= 0 && black[j+1]-2 >= 0 && sach[black[j] - 1][black[j + 1] - 2] == 0) {sach[black[j] - 1][black[j + 1] - 2] = 2; b += 2; black[b-1] = black[b-3] + 1; black[b] = black[b-2] + 2;}
                if (black[j]-2 >= 0 && black[j+1]-1 >= 0 && sach[black[j] - 2][black[j + 1] - 1] == 0) {sach[black[j] - 2][black[j + 1] - 1] = 2; b += 2; black[b-1] = black[b-3] + 1; black[b] = black[b-2] + 2;}
                if (black[j]-2 >= 0 && black[j+1]+1 <= 7 && sach[black[j] - 2][black[j + 1] + 1] == 0) {sach[black[j] - 2][black[j + 1] + 1] = 2; b += 2; black[b-1] = black[b-3] + 1; black[b] = black[b-2] + 2;}
                if (black[j]-2 >= 0 && black[j+1]+2 <= 7 && sach[black[j] - 1][black[j + 1] + 2] == 0) {sach[black[j] - 1][black[j + 1] + 2] = 2; b += 2; black[b-1] = black[b-3] + 1; black[b] = black[b-2] + 2;}




                if (black[j]+1 <= 7 && black[j+1]+2 <= 7 && sach[black[j] + 1][black[j + 1] + 2] == 1) {printf("black"); return 0;}
                if (black[j]+2 <= 7 && black[j+1]+1 <= 7 && sach[black[j] + 2][black[j + 1] + 1] == 1) {printf("black"); return 0;}
                if (black[j]+2 <= 7 && black[j+1]-1 >= 0 && sach[black[j] + 2][black[j + 1] - 1] == 1) {printf("black"); return 0;}
                if (black[j]+1 <= 7 && black[j+1]-2 >= 0 && sach[black[j] + 1][black[j + 1] - 2] == 1) {printf("black"); return 0;}
                if (black[j]-1 >= 0 && black[j+1]-2 >= 0 && sach[black[j] - 1][black[j + 1] - 2] == 1) {printf("black"); return 0;}
                if (black[j]-2 >= 0 && black[j+1]-1 >= 0 && sach[black[j] - 2][black[j + 1] - 1] == 1) {printf("black"); return 0;}
                if (black[j]-2 >= 0 && black[j+1]+1 <= 7 && sach[black[j] - 2][black[j + 1] + 1] == 1) {printf("black"); return 0;}
                if (black[j]-2 >= 0 && black[j+1]+2 <= 7 && sach[black[j] - 1][black[j + 1] + 2] == 1) {printf("black"); return 0;}

                //printf("Y");
                //sach[black[j]][black[j+1]] = 0;
            }








    } while(1);
    return 0;
}