n, m = map(int, input().split())

ans = 0    
for i in range(n):
    s, r = input().split()
    r = int(r)

    t = False
    for j in range(4):
        if r >= 1200 and s[j] == "x":
            t = True

    if r >= 1200 and t:
        ans += 1

print(ans)