import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

n, m = na()
s, r = zip(*[input().split() for i in range(n)])
r = [int(i) for i in r]
ans = 0
for i in range(n):
    if "x" in s[i][:4] and r[i] >= 1200:
        ans += 1
print(ans)