import sys
input = lambda: sys.stdin.readline().rstrip()

def main():
    # 入力
    N, M = map(int, input().split())
    # 計算・出力
    ans = 0
    for _ in range(N):
        S, R = input().split()
        R = int(R)
        if R < 1200: continue
        for i in range(4):
            if S[i] == 'x':
                ans += 1
                break
    print(ans)

if __name__ == "__main__":
    main()