#include int main(void) { int W, H; char C; int x, y; char a[2] = { 'B', 'W' }; int b, c; scanf("%d %d %c", &W, &H, &C); b = ((C == 'B') ? 0 : 1); for (y = 0; y < H; y++) { c = b ^ (y & 1); for (x = 0; x < W; x++) { putchar(a[c]); c ^= 1; } putchar('\n'); } return 0; }