n=int(input())
m=0
for i in range(n):
a=int(input())
b=a//100
c=(a-b*100)//10
d=a-b*100-c*10
if b==6 or b==9:
m=m+1
if c==6 or c==9:
m=m+1
if d==6 or d==9:
m=m+1
print(m)