r, c = map(int, input().split())

a = [["OX".find(i) for i in input()] for j in range(r)]
t = [["OX".find(i) for i in input()] for j in range(r)]

same = True
for x in range(c):
    for y in range(r):
        if a[y][x] != t[y][x]:
            same = False

if same:
    print(1)
else:
    allx = True
    for x in range(c):
        for y in range(r):
            if not a[y][x]:
                allx = False

    if allx:
        print(0)
    else:
        v1r = [0 for _ in range(r)]
        v1c = [0 for _ in range(c)]

        v0r = [0 for _ in range(r)]
        v0c = [0 for _ in range(c)]

        total = 0
        for y in range(r):
            s = sum(t[y])
            total += s
            if s == 1:
                v1r[y] = 1
            elif s == 0:
                v0r[y] = 1

        for x in range(c):
            s = sum(t[y][x] for y in range(r))
            if s == 1:
                v1c[x] = 1
            elif s == 0:
                v0c[x] = 1

        for y in range(r):
            for x in range(c):
                if t[y][x] == 1 and v1r[y] == 1 and v1c[x] == 1:
                    v1r[y] = 2
                    v1c[x] = 2

        change = True
        while change:
            change = False
            for y in range(r):
                for x in range(c):
                    if t[y][x] == 0 and (v1r[y] == 2 or v0r[y] == 2) and v0c[x] == 1:
                        v0c[x] = 2
                        change = True
                    if t[y][x] == 0 and (v1c[x] == 2 or v0c[x] == 2) and v0r[y] == 1:
                        v0r[y] = 2
                        change = True


        poss = True
        for x in range(c):
            for y in range(r):
                if a[y][x] == t[y][x] or v1r[y] == 2 or v1c[x] == 2 or v0r[y] == 2 or v0c[x] == 2:
                    pass
                else:
                    poss = False

        print(1 if total > 0 and poss else 0)