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