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

int main(){
    int H, W, sx, sy;
    cin >> H >> W >> sx >> sy;
    sx--;
    sy--;
    vector<string> S(H);
    for (int i = 0; i < H; i++){
        cin >> S[i];
    }
    int Q;
    cin >> Q;
    vector<int> gx(Q);
    vector<int> gy(Q);
    vector<int> T(Q);
    for (int i = 0; i < Q; i++){
        cin >> gx[i] >> gy[i] >> T[i];
        gx[i]--;
        gy[i]--;
    }

    const int INF = 1000000002;
    vector<vector<vector<int>>> dist(H, vector<vector<int>>(W, vector<int>(2, INF)));
    dist[sx][sy][0] = 0;
    queue<tuple<int, int, int>> que;
    que.push(make_tuple(sx, sy, 0));

    vector<int> dx = {1, 1, 0, -1, -1, -1, 0, 1};
    vector<int> dy = {0, 1, 1, 1, 0, -1, -1, -1};
    bool movable = false;
    for (int i = 0; i < 8; i++){
        if (sx + dx[i] >= 0 && sx + dx[i] < H && sy + dy[i] >= 0 && sy + dy[i] < W){
            if (S[sx + dx[i]][sy + dy[i]] == '.'){
                movable = true;
            }
        }
    }
    if (!movable){
        for (int i = 0; i < Q; i++){
            cout << "No" << endl;
        }
        return 0;
    }

    while (que.size()){
        tuple<int, int, int> tp = que.front();
        que.pop();
        int px = get<0>(tp);
        int py = get<1>(tp);
        int id = get<2>(tp);
        
        for (int i = 0; i < 8; i++){
            int nx = px;
            int ny = py;
            while (true){
                nx += dx[i];
                ny += dy[i];
                if (nx < 0 || nx >= H || ny < 0 || ny >= W){
                    break;
                }
                if (S[nx][ny] == '#'){
                    break;
                }
                if (dist[nx][ny][id ^ 1] == INF){
                    dist[nx][ny][id ^ 1] = dist[px][py][id] + 1;
                    que.push(make_tuple(nx, ny, id ^ 1));
                }
            }
        }
    }
    for (int i = 0; i < Q; i++){
        if (dist[gx[i]][gy[i]][T[i] % 2] <= T[i]){
            cout << "Yes" << endl;
        }
        else{
            cout << "No" << endl;
        }
    }
}