N , M = map( int , input().split() )

res = 0

for i in range(N) :
    S = list( map( str , input().split() ) )
    if int( S[1] ) >= 1200 :
        L = list(S[0])
        if L[0] == "x" or L[1] == "x" or L[2] == "x" or L[3] == "x" :
            res += 1

print( res )