print("YES" if 15-input().count("x")>=8 else "NO") print("YES" if 15-input().count("x")>=8 else "NO") print "YES" if 15-input().count("x")>=8 else "NO" 15-input().count("x")>=8 15-input().count("x") 15 input().count("x") ().count () input count "x" 8 "YES" "NO"
print("YES" if 15-input().count("x")>=8 else "NO")