print("NO" if input().count("x") > 7 else "YES") print("NO" if input().count("x") > 7 else "YES") print "NO" if input().count("x") > 7 else "YES" input().count("x") > 7 input().count("x") ().count () input count "x" 7 "NO" "YES"
print("NO" if input().count("x") > 7 else "YES")