n,m = map(int,input().split())
count = 0

for _ in range(n):
    s = list(map(str,input().split(' ')))
    
    for i in range(m):
        if 0 <= i <= 3:
            if s[0][i] == "x":
                if int(s[1]) >= 1200:
                    count += 1
                    break
print(count)