N,M = map(int,input().split())
SR = [list(map(str,input().split())) for _ in range(N)]
SR = [[SR[i][0],int(SR[i][1])] for i in range(N)]

ans = 0
for i in range(N):
    if SR[i][1] >= 1200:
        for j in range(4):
            if SR[i][0][j] == 'x':
                ans += 1
                break
print(ans)