H,W = map(int,input().split())
N = int(input())
C = [list(input().split()) for _ in range(N)]
C = [[C[i][0],int(C[i][1])] for i in range(N)]
X = [0,0]
while C:
    y,z = C.pop()
    if y=="R" and z==X[0]:
        X[1] -= 1
        if X[1]<0:
            X[1] += W
    elif y=="C" and z==X[1]:
        X[0] -= 1
        if X[0]<0:
            X[0] += H
A = []
a = []
b = []
for i in range(W):
    if i%2==0:
        a.append("white")
        b.append("black")
    else:
        a.append("black")
        b.append("white")
for i in range(H):
    if i%2==0:
        A.append(a)
    else:
        A.append(b)
print(A[X[0]][X[1]])