n, m = map(int, input().split())
cnt = 0
for _ in range(n):
    s, r = input().split()
    r = int(r)
    flag = []
    for i in range(4):
        if s[i] == "x":
            flag.append(True)
        else:
            flag.append(False)
    if r >= 1200 and any(flag):
        cnt += 1
print(cnt)