N,M=map(int, input().split())
ans = 0
for _ in range(N):
    S,R=input().split()
    R=int(R)
    if R >= 1200 and \
        (S[0] == 'x' or S[1] == 'x' or S[2] == 'x' or S[3] == 'x'):
        ans += 1
print(ans)