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

const int kMAX_H = 60;
const int kMAX_W = 60;

int H, W, A, Si, Sj, B, Gi, Gj;

string M[kMAX_H];

int dp[kMAX_H][kMAX_W][kMAX_H * kMAX_W];
bool used[kMAX_H][kMAX_W][kMAX_H * kMAX_H];

int dr[4] = {1, 0, -1, 0},
    dc[4] = {0, 1, 0, -1};

bool CanReach(int row, int col, int snow) {
    // cout << row << " " << col << " " << snow << endl;
    if (dp[row][col][snow] >= 0) {
        return dp[row][col][snow];
    }

    used[row][col][snow] = true;
    bool result = (row == Gi && col == Gj && snow == B);

    for (int i = 0; i < 4; i++) {
        int nrow = row + dr[i], ncol = col + dc[i], nsnow;
        if (0 <= nrow && nrow < H && 0 <= ncol && ncol < W) {
            nsnow = snow + (M[nrow][ncol] == '*' ? 1 : -1);
            if (nsnow <= 0 || nsnow >= kMAX_H * kMAX_W ||
                    used[nrow][ncol][nsnow]) continue;

            result = result || CanReach(nrow, ncol, nsnow);
        }
    }
    used[row][col][snow] = false;
    return dp[row][col][snow] = result;
}

int main() {
    cin >> H >> W >> A >> Si >> Sj >> B >> Gi >> Gj;

    for (int i = 0; i < H; i++) {
        cin >> M[i];
    }

    memset(dp, -1, sizeof(dp));

    if (CanReach(Si, Sj, A)) {
        cout << "Yes" << endl;
    } else {
        cout << "No" << endl;
    }

    return 0;
}