#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
    int h,w,n;
    cin>>h>>w>>n;
    int a[n],b[n];
    for (int i=0;i<n;i++) cin>>a[i]>>b[i];
    int r=0;
    int c=0;
    for (int i=n-1;i>=0;i--) {
        if (a[i]=='R'&&b[i]==r) c=(c-1+w)%w;
        else if (a[i]=='C'&&b[i]==c) r=(r-1+h)%h;
    }
    if ((r+c)%2==0) puts("white");
    else puts("black");
    return 0;
}