// yukicoder: 351 市松スライドパズル
// 2019.6.8 bal4u

#include <stdio.h>

#if 1
#define gc() getchar_unlocked()
#else
#define gc() getchar()
#endif

int in()    // 非負整数の入力
{
	int n = 0, c = gc();
	do n = 10 * n + (c & 0xf); while ((c = gc()) >= '0');
	return n;
}

int row[1000005], no[1000005];

int main()
{
	int i, N, H, W, r, c;

	H = in(), W = in(), N = in();
	i = N; while (i--) {
		row[i] = gc() & 1, gc();  // 'R'=0x52, 'C'=0x43
		no[i] = in();
	}
	r = c = 0;
	for (i = 0; i < N; i++) {
		if (row[i]) {
			if (no[i] == c) { if (--r < 0) r = H-1; }
		} else {
			if (no[i] == r) { if (--c < 0) c = W-1; }
		}
	}
	puts((r+c) & 1? "black": "white");
	return 0;
}