import sys


# sys.setrecursionlimit(10**8)


def debug(*args):
    print(*args, file=sys.stderr)


ans = 0
n, m = map(int, input().split())
for _ in range(n):
    r, s = input().split()
    if int(s) >= 1200 and 'x' in r[:4]:
        ans += 1

print(ans)