N,M=map(int,input().split())
cnt=0
for i in range(N):
    S,R=input().split()
    S=list(S)
    R=int(R)
    if R>=1200 and (S[0]=="x" or S[1]=="x" or S[2]=="x" or S[3]=="x"):
        cnt+=1
print(cnt)