#include<iostream>
#include<vector>
using namespace std;

int main(){
    int H, W, n, k;
    vector<string> order;
    string sandk;

    scanf("%d %d", &H, &W);
    scanf("%d\n", &n);

    for(int i = 0; i < n; i++){
        getline(cin, sandk);
        order.insert(order.begin(), sandk);
    }

    int h = 0, w = 0;

    for(int i = 0; i < n; i++){
        string now = order[i];
        if(now[0] == 'R' && h == now[2]-'0'){
            w--;
            if(w < 0)   w += W;
        }else if(now[0] == 'C' && w == now[2]-'0'){
            h--;
            if(h < 0)   h += H;
        }
    }

    if((h+w)%2 == 0)    cout << "white" << endl;
    else                cout << "black" << endl;

    return 0;
}