n, m = map(int, input().split())
l = [input().split() for _ in range(n)]

cnt = 0
t = []

for i in range(n):
  if int(l[i][1]) >= 1200:
    t.append(l[i][0])

for j in t:
  if "x" in j[0:4]:
    cnt += 1
  
print(cnt)