from Queue import Queue
h, w = map(int,raw_input().split())
a, si, sj = map(int,raw_input().split())
b, gi, gj = map(int,raw_input().split())
m = [list(raw_input()) for i in range(h)]
maxsize = 1200
visited = [[[False] * maxsize for i in range(w)] for j in range(h)]

qi = Queue()
qj = Queue()
qsize = Queue()
visited[si][sj][a] = True
qi.put(si)
qj.put(sj)
qsize.put(a)

dx = [0, 1, 0,-1]
dy = [1, 0,-1, 0]

while not qsize.empty():
    curi = qi.get()
    curj = qj.get()
    cursize = qsize.get()
    #print(cursize,curi, curj)
    for i in range(4):
        nexti = curi + dx[i]
        nextj = curj + dy[i]
        if 0 <= nexti < h and 0 <= nextj < w:
            pass
        else:
            continue

        if m[nexti][nextj] == "*":
            nextsize = cursize + 1
        else:
            nextsize = cursize - 1

        if 0 < nextsize < maxsize:
            pass
        else:
            continue

        if not visited[nexti][nextj][nextsize]:
            visited[nexti][nextj][nextsize] = True
            qi.put(nexti)
            qj.put(nextj)
            qsize.put(nextsize)

if visited[gi][gj][b]:
    print "Yes"
else:
    print "No"