import sys
input = sys.stdin.readline

def to_num(s):
    ret = 0
    for c in s:
        x = ord(c) - ord('0')
        ret <<= 3
        ret += x
    return ret


N, K = map(int, input().split())
st = list([to_num(input()[:-1]) for _ in [0] * N])

visited = [0] * (1 << (K * 5))
for v_start in st:
    if(visited[v_start] == 1):
        continue
    stk = [v_start]
    while(stk):
        v_now = stk.pop()
        for i in range(0, K * 3, 3):
            if(((v_now >> i) & 7) == 0):
                continue
            v_next = v_now - (1 << i)
            if(visited[v_next] == 1):
                continue
            visited[v_next] = 1
            stk.append(v_next)

ans = sum(visited[x] for x in st)
print(ans)