n, m = map(int, input().split())
b = []
for i in range(n):
    b.append(input())

g = [['.' for _ in range(m)] for k in range(n)]

ct1 = 0
ct2 = 0

for i in range(n):
    for j in range(m):
        g[i][j] = b[i][j]
        if g[i][j] == 'X':
            ct1 += 1

b = []

for i in range(n):
    b.append(input())

t = [['.' for _ in range(m)] for k in range(n)]

for i in range(n):
    for j in range(m):
        t[i][j] = b[i][j]
        if t[i][j] == 'X':
            ct2 += 1

if ct1 == n*m:
    if ct2 == n*m:
        print(1)
    else:
        print(0)
elif ct2 == 0:
    if ct1 == 0:
        print(1)
    else:
        print(0)
else:
    c = [1 for i in range(m)]
    r = [1 for i in range(n)]
    # print(len(r),len(c))

    for i in range(n):
        ct = 0
        for j in range(m):
            if t[i][j] == 'X':
                ct += 1
        if ct > 1:
            r[i] = 0
            for j in range(m):
                if t[i][j] == 'X':
                    c[j] = 0

    for j in range(m):
        ct = 0
        for i in range(n):
            if t[i][j] == 'X':
                # print(i,j)
                ct += 1
        if ct > 1:
            # print(j,m,n,ct)
            c[j] = 0
            for i in range(n):
                if t[i][j] == 'X':
                    r[i] = 0

    check = True

    if sum(c) == 0 or sum(r) == 0:
        for i in range(n):
            for j in range(m):
                if t[i][j] != g[i][j]:
                    check = False

    for i in range(n):
        # print(i,n,len(r))
        if r[i] > 0:
            continue
        for j in range(m):
            if t[i][j] == 'X':
                check = check and (t[i][j] == g[i][j])

    for j in range(m):
        if c[j] > 0:
            continue
        for i in range(n):
            if t[i][j] == 'X':
                check = check and (t[i][j] == g[i][j])

    if check:
        print(1)
    else:
        print(0)