N, M = map(int,input().split())
count = 0
for i in range(N):
	S, R = input().split()
	R = int(R)
	if R >= 1200:
		frag = True
		for j in range(4):
			if S[j] == "x":
				frag = False
		if not frag:
			count += 1
print(count)