from heapq import heappop, heappush, heapify
from bisect import bisect
from sortedcontainers import SortedList
from collections import deque, defaultdict
from math import floor, ceil, isqrt, comb
from sys import stdin, setrecursionlimit
setrecursionlimit(10**7)
intin = lambda: int(stdin.readline())
strin = lambda: stdin.readline().rstrip()
listin = lambda: list(map(int, stdin.readline().split()))
tuplein = lambda m: [tuple(map(lambda x: int(x) if x.isdigit() or (len(x) > 1 and x[0] == "-" and x[1:].isdigit()) else x, stdin.readline().split())) for _ in range(m)]
gridin = lambda m: [list(map(int, stdin.readline().split())) for _ in range(m)]
strgridin = lambda h: [stdin.readline().rstrip() for _ in range(h)]
mapin = lambda: map(int, stdin.readline().split())
N, M = mapin()
ans = 0
for i in range(N):
    S, R = strin().split()
    R = int(R)
    if R >= 1200:
        if S[:4].count("x"):
            ans += 1
print(ans)