#include <bits/stdc++.h>   inline int read() {     int f = 1, x = 0;     char ch = getchar();     while (!(ch >=  0  && ch <=  9 )) {       if (ch ==  - ) f *= -1;       ch = getchar();     }     while (ch >=  0  && ch <=  9 ) {       x = x * 10 + ch -  0 ;       ch = getchar();     }     return f * x;   }   int dx[8] = {1, 1, -1, -1, 2, 2, -2, -2};   int dy[8] = {2, -2, 2, -2, 1, -1, 1, -1};   struct Point {     int x, y, c, fa;     friend bool operator==(Point a, Point b) {       return (a.x == b.x && a.y == b.y);     }   } w[2], b[2], other, list[4][1000 * 1000 + 1];   void readother() { std::cin >> other.x >> other.y; }   bool check(Point a, Point b) {     int x = abs(a.x - b.x), y = abs(a.y - b.y);     if (x <= 2 && y <= 2 && x + y == 3) {       printf( %d %d n , b.x, b.y);       return true;     }     return false;   }   int otherx, othery;   bool bk = false;   void printlist(int k, Point a) {     if (a.fa == -1 || bk == true) return;     if (a.fa != 1) printlist(k, list[k][a.fa]);     if (check(a, other) == true) bk = true;     if (bk == true) return;     printf( %d %d n , a.x, a.y);     readother();   }   int n, m, head, tail, v[4][1000 + 1][1000 + 1];   void closer(int k, Point st, Point ed) {     Point a, b;     head = tail = 1;     memset(v[k], 0, sizeof(v[k]));     v[k][st.x][st.y] = head;     list[k][head] = st, list[k][head].c = 0, list[k][head].fa = -1;     if (st == ed) return;     while (head <= tail) {       a = list[k][head];       for (int i = 0; i < 8; i++) {         b = a, b.x += dx[i], b.y += dy[i], b.c++;         if (b.x < 1 || b.y < 1 || b.x > n || b.y > m || v[k][b.x][b.y] != 0)           continue;         tail++;         v[k][b.x][b.y] = tail;         b.fa = head;         list[k][tail] = b;         if (b == ed) return;       }       head++;     }   }   void printlast(int k) {     Point a;     if (k == 0) {       a = b[0];       if (check(a, other) == false) {         a = b[0], a.x -= 1, a.y += 2;         printf( %d %d n , a.x, a.y), readother();       } else         return;       if (check(a, other) == false) {         a = b[0], a.x -= 3, a.y += 1;         printf( %d %d n , a.x, a.y), readother();       } else         return;       if (check(a, other) == false) {         a = b[0], a.x -= 1;         printf( %d %d n , a.x, a.y), readother();       } else         return;     } else {       a = w[0];       if (check(a, other) == false) {         a = w[0], a.x += 1, a.y += 2;         printf( %d %d n , a.x, a.y), readother();       } else         return;       if (check(a, other) == false) {         a = w[0], a.x += 3, a.y += 1;         printf( %d %d n , a.x, a.y), readother();       } else         return;       if (check(a, other) == false) {         a = w[0], a.x += 1;         printf( %d %d n , a.x, a.y), readother();       } else         return;     }   }   bool choose;   int main() {     n = read(), m = read(), w[1].x = read(), w[1].y = read(), b[1].x = read(),     b[1].y = read();     w[0].x = n / 2, w[0].y = m / 2, b[0].x = n / 2 + 1, b[0].y = m / 2;     closer(0, w[1], w[0]), closer(1, b[1], b[0]);     closer(2, w[1], b[0]);     closer(3, b[1], w[0]);     if ((w[1].x + w[1].y) % 2 != (b[1].x + b[1].y) % 2) {       if (list[0][v[0][w[0].x][w[0].y]].c <= list[1][v[1][b[0].x][b[0].y]].c)         printf( WHITE n ), other = b[1],                            printlist(0, list[0][v[0][w[0].x][w[0].y]]);       else if (list[2][v[2][b[0].x][b[0].y]].c >=                list[1][v[1][b[0].x][b[0].y]].c + 2)         printf( BLACK n ), readother(),             printlist(1, list[1][v[1][b[0].x][b[0].y]]);       else         printf( WHITE n ), other = b[1],                            printlist(2, list[2][v[2][b[0].x][b[0].y]]),                            printlast(0);     } else {       if (list[1][v[1][b[0].x][b[0].y]].c < list[0][v[0][w[0].x][w[0].y]].c)         printf( BLACK n ), readother(),             printlist(1, list[1][v[1][b[0].x][b[0].y]]);       else if (list[3][v[3][w[0].x][w[0].y]].c > list[0][v[0][w[0].x][w[0].y]].c)         printf( WHITE n ), other = b[1],                            printlist(0, list[0][v[0][w[0].x][w[0].y]]);       else         printf( BLACK n ), readother(),             printlist(3, list[3][v[3][w[0].x][w[0].y]]), printlast(1);     }   }   