def readints():
  return list(map(int, input().split()))

def deep_recursion():
  import sys
  sys.setrecursionlimit(550000)

def main():
  N, M = readints()
  ans = 0
  for _ in range(N):
    r, s = input().split()
    s = int(s)
    if 'x' in r[:4] and s >= 1200:
      ans += 1
  print(ans)


if __name__ == '__main__':
  # deep_recursion()
  main()