N, M = map(int, input().split())
assert(1 <= N <= 2 * (10 ** 5))
assert(4 <= M <= 10)

ans = 0
for _ in range(N):
    result, rating = input().split()
    assert(len(result) == M)
    assert(set(result) == {'o','x'})
    assert(0 <= int(rating) <= 5000)
    if result[:4] != "oooo" and int(rating) >= 1200:
        ans += 1

print(ans)