Can this be summarised on the ACL?

[Deloso, Elmer G (WPNSTA Yorktown)]

Hi,group.
I'd like to verify if there is a way to define a mask to summarise this.
Basically, i'd like to be able to summarise range 172.18.0.0 to 172.31.0.0
with
a mask so I'll have one entry on the access-list. I can see doing a
172.16.0.0
0.0.15.255, however i want to EXCLUDE 172.17.0.0 networks. 
If this is not possible, perhaps I should just put a permit 172.17.0.0 prior
to deny 172.16.0.0 0.0.15.255??
Thanks for the replies.

Elmer Deloso

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