Specific DHCP config

Hi all,
Im using Ubuntu and due to the nature of my application, I have to configure a DHCP server that assigns addresses that end with bits '10'. The IP addresses must be of the type 10.x.y.z/22

So some examples of IP addr to be assigned:

10.1.2.2
10.12.18.14
10.6.155.6
10.121.76.22
10.5.45.18
...etc

As you see all the IP addr end with '10' binary bits.

How do I write the dhcpd.conf file?

Thanks a lot in advance

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