N, M = map(int, input().split())
A = []
count = 0
for i in range(N):
    A.append(list(map(int,input().split())))
K, R = map(float, input().split())
for i in range(N):
    for j in range(M):
        if (sum(map(int, list(str(A[i][j]))))) % R == 0 and len(str(A[i][j])) == K:
            count += 1
print(count)