N, M = map(int, input().split())
SR = [list(input().split()) for _ in range(N)]

ans = 0
for S, R in SR:
    R = int(R)
    if R < 1200:
        continue
    cnt = 0
    for s in S[:4]:
        if s == "x":
            cnt += 1
    if 1 <= cnt:
        ans += 1

print(ans)