def read_data():
    H, W = map(int, input().split())
    A, Si, Sj = map(int, input().split())
    B, Gi, Gj = map(int, input().split())
    Ms = [[c == '*' for c in input()] for i in range(H)]
    return H, W, A, Si, Sj, B, Gi, Gj, Ms


def solve(H, W, A, Si, Sj, B, Gi, Gj, Ms):
    if (A - B + (Si - Gi) + (Sj - Gj)) % 2:
        return False
    lower = [[float('inf')] * W for h in range(H)]
    upper = [[-1] * W for h in range(H)]
    lower[Si][Sj] = A
    upper[Si][Sj] = A
    fs = set([(Si, Sj)])
    while fs:
        nfs = set()
        for i, j in fs:
            m = Ms[i][j]
            min_snow = lower[i][j]
            max_snow = upper[i][j]
            for di, dj in [(-1, 0), (1, 0), (0, -1), (0, 1)]:
                ni = i + di
                nj = j + dj
                if ni < 0 or ni >= H or nj < 0 or nj >= W:
                    continue
                if update_status(m, min_snow, max_snow, ni, nj, upper, lower, Ms):
                    nfs.add((ni, nj))
        if lower[Gi][Gj] <= B and upper[Gi][Gj] >= B:
            return True
        fs = nfs
    return False


def update_status(m, min_snow, max_snow, ni, nj, upper, lower, Ms):
    n_m = Ms[ni][nj]
    if m != n_m:
        n_min_snow = min_snow + 2 * n_m - 1
        if n_min_snow == 0:
            n_min_snow = float('inf')
        n_max_snow = max_snow + 2 * n_m - 1
        if n_max_snow == 0:
            n_max_snow = -1
    elif n_m:
        n_min_snow = min_snow + 1
        n_max_snow = float('inf')
    else:
        if min_snow == 1:
            n_min_snow = float('inf')
        elif min_snow % 2:
            n_min_snow = 2
        else:
            n_min_snow = 1
        n_max_snow = min_snow - 1        
    changed = False        
    if n_min_snow < lower[ni][nj]:
        lower[ni][nj] = n_min_snow
        changed = True
    if n_max_snow > upper[ni][nj]:
        upper[ni][nj] = n_max_snow
        changed = True
    return changed
                

H, W, A, Si, Sj, B, Gi, Gj, Ms = read_data()
if solve(H, W, A, Si, Sj, B, Gi, Gj, Ms):
    print('Yes')
else:
    print('No')